JPH0525622B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an apparatus for machining one machining part of a workpiece in two steps.

<Conventional technology> When performing the two processes of boring and burnishing a through hole in a workpiece at the same station, the workpiece is clamped and held at the same position for both boring and burnishing. A pair of machining units are placed on both sides of the machine so that they can move forward and backward, and one machining unit is equipped with a boring tool.
In addition, the other machining unit is equipped with a burnishing tool, and when boring is performed by advancing the machining unit equipped with a boring tool, the machining unit equipped with the burnishing tool is located at the backward end, and when the machining unit equipped with the burnishing tool moves forward, the machining unit equipped with the burnishing tool is positioned at the backward end. During burnishing, a processing unit equipped with a boring tool performs two-step processing by operating at the retreating end.

<Problems to be Solved by the Invention> In the conventional machining device described above, a pair of machining units placed on both sides of the workpiece each move forward and backward relative to the workpiece to perform machining. , not only is the floor space large, but the workpiece is completely fixed and the tool is advanced towards this workpiece, so the two tools, which are not necessarily placed exactly concentrically, are burnishing. burnishing was not performed based on the hole machined in the previous process, resulting in uneven burnishing.

The present invention provides a two-step machining device that can reduce floor space, reliably perform burnishing based on the holes machined in the previous process, and obtain uniform burnishing.

<Means for Solving the Problems> The present invention comprises a machining unit and a support device for a workpiece, and the machining unit is movable forward and backward relative to the support device, and has a first part for boring. A first processing tool and a second processing tool for burnishing a hole bored by the first processing tool are provided with axes parallel to vertical positions, and the support device corresponds to the first processing tool. a vertically movable clamp rod that presses and clamps the workpiece to a fixed reference surface at a first holding position; and a clamp rod that clamps the workpiece between the clamp rod and moves the workpiece from the first holding position to the second processing tool. It is provided with an elevating and lowering extractor rod that shifts to a corresponding second holding position and supports the workpiece in a floating manner in the second holding position.

<Function> The above-mentioned present invention moves the workpiece carried into the second holding position of the support device by the transfer device upwardly to the first holding position by the clamping device, and presses and clamps it against the reference surface, As the machining unit moves forward, the workpiece is bored by the first machining tool, and the machining unit is moved backward and lowered to the second holding position where the workpiece can float, and the machining unit is moved forward again, and the second machining tool The hole bored in the previous process is burnished by the burnishing machine, and when the machining unit is retracted, the machined workpiece is transferred to the second holding position by the transfer device.

<Examples> Examples of the present invention will be described below based on the drawings. In FIG. 1, 1 is a bed, and 2 is a base fixed on the bed 1. As shown in FIG. A first processing unit 4 is placed on this base 2 via a feed table 3.
In the figure, it is provided so that it can move forward and backward in the left and right directions. In the machining unit 4, a boring tool 5, which is a first machining tool, is placed on the upper stage, and a boring tool 5, which is a first machining tool, is placed on the upper stage, and a
A burnishing tool 6, which is a processing tool, is provided on the lower stage with axes parallel to each other.

On the bed 1 in front of the processing unit 4,
A support device 7 for a workpiece to be processed by the processing unit 4 in two steps is installed. The specific structure of this support device 7 will be explained with reference to FIG. 2 and FIG. 5.

In FIGS. 2 and 3, 30 is a support device main body. The support device main body 30 has a first holding position 9 on the top thereof, to which a support metal 8 having a reference surface for pressing and positioning the workpiece W in correspondence with the boring tool 5 is fixed. Further, directly below this first holding position 9, a second
This second holding position 11 corresponds to the burnishing tool 6 and holds the workpiece W in a floating manner. 12 is a transfer bar, and 13 is an engaging claw.

A clamp device for positioning and moving the workpiece W is provided at the first holding position 9 and the second holding position 11. Its structure is such that a lifting body 14 is attached to a guide bar 15 provided in a vertical axis direction on a supporting device main body 30.
A clamper 23 is provided at the lower part of the elevating body 14 and is provided with a clamp rod 24 extending in the vertical axis direction. This clamp rod 24 holds the workpiece W carried into the second holding position 11 on the elevating body 1.
4 is lifted up by the rising end of the support 8 and clamped at the first holding position 9 by pressing it against the reference surface of the support 8. At the same time, the workpiece W is moved to the second holding position on the transport rail 10 at the descending end of the elevating body 14. It is located at 11. Therefore, an insertion hole 25 is formed in the clamp rod 24 in order to allow the boring tool 5 for drilling the hole H in the workpiece W to pass therethrough while the workpiece W is clamped at the first holding position 9.

The clamper 23 has a mechanism that, when clamping the workpiece W by the clamp rod 24, performs temporary clamping at an intermediate stop position determined by a positioning pin 26, which will be described later, and main clamping at the rising end. The mechanism is as shown in FIG. A rod 35 is provided which penetrates the lower part of the cylinder 33 to the outside, and a stopper 36 is fixedly installed at the lower end of the rod 35 so as to come into contact with the lower surface of the main body 33 of the clamper 23. weak spring 3
8, and a strong spring 37 between the main body 33 of the clamper 23 and the rod 35.
This is a structure with an intervening structure.

The positioning pin 26 is provided on the support device main body 30 so as to be movable in the horizontal axis direction so as to be inserted into the hole H of the workpiece W at the first holding position 9, and the positioning pin installed on the support device main body 30 can be moved back and forth. It is connected to a cylinder 27 for use.

20 is a guide for the workpiece W. This guide 2
0 is located at the first holding position 9 and the second holding position 11 by the guide lifting cylinder 17. The guide lifting cylinder 17 is connected to the support device main body 30.
A connecting plate 1 is provided at the upper end of the piston rod 18 in the vertical axis direction on the block 39 fixedly installed above.
The cylindrical guide 20 is fixed to the lower end of a pair of support rods 21 in the vertical axis direction, which are fixed to the connecting plate 19.

When the guide 20 is at the upper end, it is moved to the first holding position 9 by the clamp rod 24.
The workpiece W to be processed is guided at the second holding position 11 when it is at the descending end.
This protects it in a floating state. Therefore, the guide 20 is provided with holes 22 on both sides through which the boring tool 5 passes through at the ascending end position.

28 is an extraction rod. The extraction rod 28 is for pushing down and extracting the workpiece W which is crimped onto the reference surface of the support 8 at the first holding position 9, and is provided on the block 39 so as to be movable up and down. This downward movement of the extractor rod 28 is performed in conjunction with the downward movement of the guide 20 by the connecting plate 19, which is part of the elevating mechanism of the guide 20, coming into contact with the upper end surface of the extractor rod 28, and the upward movement is performed in conjunction with the downward movement of the guide 20. rod 2
A locking rod is attached to a horizontal rod 31 fixed to the upper end of the elevating body 14 so as to intersect with the axis of the extraction rod 28, and a locking rod is fixed in the vertical axis direction to the upper end of the elevating body 14 by slidingly passing through the horizontal rod 31. The abutment portion 32a at the lower end of the lift body 14 comes into contact with the rise of the elevating body 14. Note that the upper end of the locking rod 32 has a large diameter portion 3.
2b is formed, and even if the horizontal rod 31 attempts to rise when the extraction rod 28 is in the lowered position, it comes into contact with the large diameter portion 32b and restricts the rise. Further, the lower end of the extraction rod 28 is formed into two forks 29, and a second
When processing the workpiece W with the burnishing tool 6 at the holding position 11, the boring tool 5 is moved forward at the same time to avoid interference with the lower end of the extraction rod 28 that has descended to the first holding position 9. It has 5 penetration parts.

Next, the operation of the present invention with the above configuration will be explained. The original position of the clamp rod 24 is the elevating body 14
is at the lower end, and the upper end of the clamp rod 24 is located below the conveyor rail 10 at the second holding position 11. In this state, the workpiece W travels on the transport rail 10 and is carried into the second holding position 11 by the transfer device. Thereafter, the clamper actuating cylinder 16 is actuated to move the elevating body 14 upward to an intermediate stop position. This upward movement of the elevating body 14 causes the clamp rod 24 to rise, and the workpiece W on the transport rail 10 is picked up while being held between the rods 28 and shifted to the first holding position 9. The workpiece W that has been shifted to the first holding position 9 is guided by the guide 20, maintains its posture correctly, and comes into contact with the reference surface of the support 8. When in this halfway stop position, the upper end of the rod 35 is not in contact with the end of the inner hole of the cylinder 34, and the clamper 23 is in a tentative state due to the pressure of the spring 38 with a weak spring force, and in this state, the clamper 23 is positioned. Cylinder 2 for pin advancement/retraction
7 operates to advance the positioning pin 26 and fit into the hole H of the workpiece W, thereby positioning the workpiece W. After that, the elevating body 14 is further raised to the rising end, so that the upper end of the rod 35 comes into contact with the end of the inner hole of the cylinder 34, which causes the strong spring 37 of the clamper 23 to press against it. After the initial adjustment is performed, the positioning pin 27 is moved back and extracted from the H of the workpiece W.

Next, the machining unit 4 advances, the boring tool 5 bores a hole in the workpiece W at the first holding position 9, and the machining unit 4 retreats.

When this first step is completed, the lowering movement of the elevating body 14 and the lowering movement of the guide 20 are started, and at the same time, the connecting plate 19 comes into contact with the upper end of the extractor rod 28, so that the lowering movement of the extractor rod 28 is simultaneously performed. be exposed. As a result, the workpiece W that was crimped to the support 8 at the first holding position 9 is forcibly extracted by the extraction rod 28, and the workpiece W supported by the descending clamp rod 24 is protected by the guide 20. while being shifted onto the transport rail 10 at the second holding position 11. The workpiece W at the second holding position 11 is supported on the transport rail 10, and the surrounding area is surrounded by a guide 2.
0 and 0, and is positioned in a floating state.

After the workpiece W is shifted to the second holding position 11, the machining unit 4 moves forward again, and burnishes the hole H in the workpiece W using the lower burnishing tool 6. At this time, since the workpiece W can float, the burnishing process is performed based on the hole H machined in the first step. After completion of the second step in which the processing unit 4 is retreated, the guide 20 rises to its original position. This guide lifting cylinder 1
When the guide 20 is raised by 7, the workpiece W
sticks to the guide 20 and tries to rise together. However, the lifting of the extraction rod 28 is restricted by the horizontal rod 31 coming into contact with the large diameter portion 32b of the locking rod 32, so the workpiece W comes into contact with this extraction rod 28 and is extracted from the guide 20. , remains on the transport rail 10. Thereafter, the processed workpiece W is transported out by a transfer device.

<Effects of the Invention> According to the present invention, the workpiece is shifted vertically to correspond to two different tools provided in the machining unit, and two-step machining is performed, thereby reducing the floor space. In addition, at the first holding position, the workpiece is in a strong clamping state to perform accurate boring, and at the second holding position, the burnishing process is performed with the workpiece in a floating state. Since the burnishing process is performed based on a hole, uniform burnishing can be obtained, and since the processing unit is a single unit, it can be provided at a low cost.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device of the present invention, Fig. 2 is a front partial sectional view of the support device, Fig. 3 is a partial sectional view taken in the direction of the arrow in Fig. 2, Fig. 4 is a view in the direction of the arrow in Fig. 2, and Fig. 5. is the second
It is a figure-line sectional view. 1...bed, 2...base, 3...feeding stand,
4... Processing unit, 5... Boring tool, 6
... Burnishing tool, 7 ... Support device, 8 ... Support metal, 9 ... First holding position, 10 ... Conveyance rail, 11 ... Second holding position, 14 ... Elevating body, 1
6... Cylinder for clamper operation, 17... Cylinder for guide elevation, 19... Connection plate, 20... Guide, 23... Clamper, 24... Clamp rod, 26... Positioning pin, 27... Positioning pin for advancing/retracting. Cylinder, 28...Extraction rod.

Claims (1)

[Claims] 1 Consists of a machining unit and a support device for the workpiece, the machining unit being capable of moving forward and backward with respect to the support device, and a first machining tool that performs boring, and a and a second machining tool for burnishing the bored hole, the support device having an axis parallel to the vertical position,
a liftable clamp rod that presses and clamps the workpiece to a fixed reference surface at a first holding position corresponding to the first processing tool; and a clamp rod that clamps the workpiece between the clamp rod and the workpiece at the first holding position. 2-step machining, characterized in that it is equipped with an elevating and lowering extractor rod which shifts to a second holding position corresponding to the second machining tool and supports the workpiece in a floating manner in the second holding position. Device.