JPS6160225A - Automatic thin plate drilling device - Google Patents

Abstract

PURPOSE:To make an arrangement work easier and to reduce a working cost in drilling by using a punching work method in drilling and by performing a program control of the free dividing device which moves and stops freely in each direction the working unit thereof. CONSTITUTION:A work 6 is firmly supported by members 8, 8A, 8B, when the work 6 of the oil pan, etc. for automobile, for instance, is placed on the member 8 of the clamp device 2 where a clamp member 8B is set in the appropriate position. Now with pushing the starting button of a control device a work moving device 3 is motioned and the device 2 and the work 6 are moved to the working position and stopped at the figured position. In this case the free dividing device 5 stopping at an optional position with moving a drilling work unit 4 in the directions of up and down, right and left and force and at performs a division so that the punch 22 and die 23 of the unit 4 at the front and opposite sides of the figure can be located at the prescribed position respectively. The hole of the prescribed diameter is thereafter made on the drilling work part 6a of the work with the co-work of the punch 22 and die 23. A similar drilling is performed for the 2nd position and the work is progressed similarly thereafter.

Description

[Detailed Description of the Invention] Technical Field - The present invention relates to an automatic thin plate drilling device, particularly for freely punching clean holes without burrs in thin plate workpieces that require a large number of holes to be drilled, such as automobile oil pans. is possible,
Moreover, the present invention relates to an automatic thin plate drilling device that does not require a press die or its setup change.

PRIOR ART Conventionally, the drilling of thin plate workpieces that require a large number of holes, such as automobile oil pans, has been performed by drilling using a multi-spindle drilling machine. A jig is required to guide the
Moreover, this jig has the disadvantage that the hole position and number of holes change when the type of workpiece changes, so a separate jig must be prepared for each workpiece, and a large number of man-hours are required for setup changeover work. was there. Drilling also has the disadvantage that a hole is generated when the drill is pulled out, making it impossible to obtain a clean hole in one go.Another method is punching using a press, but conventionally It was necessary to make a separate press die for each type of workpiece, and to replace the press die each time the type changed, which required setup changes and required investment to manufacture the press die, resulting in high costs. Moreover, there was a drawback that a considerable amount of space was required to store the idle press molds.

Purpose The present invention has been made in order to eliminate the drawbacks of the above-mentioned prior art, and its purpose is to adopt a punching method using a punch and a die for drilling holes in a thin plate. A high-pressure ram and a high-pressure hydraulic pump are used to drive the drilling unit for the die and the die, and a micro-indexing device is used to freely move and stop the drilling unit in the vertical, rotational, front-back, and left-right directions. By operating a stepping motor, air cylinder, etc. controlled by a control device incorporating a computer, a predetermined program is created for each type of thin plate work, and when the type of work changes, the program is changed. The aim is to eliminate the need for press dies by simply replacing the press dies.This also simplifies light setup work, reduces drilling costs, and eliminates the need for idle press dies. , to make effective use of factory space. Another purpose is to freely punch clean holes without burrs in the thin plate by employing a punching process. Still another object is to make the clamping device for the workpiece telescopic so that the same clamping device can be used even if the type of workpiece changes.

Overview In short, the present invention includes a work clamping device provided with a plurality of clamp members for supporting a hole-drilling portion of a thin plate workpiece, a workpiece moving device that reciprocates the workpiece clamping device in one direction, and a workpiece moving device driven by a hydraulic cylinder. A punch and a die are provided. A drilling unit for drilling holes in the workpiece using the punch and die, and a mechanism for moving the drilling unit in the vertical direction, rotational direction, left and right directions, and front and back directions and stopping it at any position. a free indexing device,
The present invention is characterized by comprising a control device that controls the operation of each of these devices according to a predetermined program.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on embodiments shown in the drawings. The automatic thin plate drilling device l according to the present invention includes a workpiece clamping device 2, a workpiece moving device 3, a drilling unit 4,
It includes a free indexing device 5 and a control device (not shown).

As shown in FIGS. 1 and 3, the work clamp device 2 is provided with a plurality of clamp members 8 that support a hole-machined portion 6a of a thin plate work 6 (the one shown is an engine oil pan). Yes, the upper end 8a of each clamp member 8
There is a clamp piece 10 for forming the clamp groove 9 in which the bent part 6C of the 7 flange part 6b of the workpiece 6 engages.
11, and is divided into a fixed side clamp member 8A and a movable side clamp member 8B. The clamp member 8A on the fixed side is attached to the piston rod 14 of the air cylinder 3 fixed to the base 12, and the two guide rods 1
The clamp member 8B is fixed to the workpiece moving table 16 which is configured to be slidable by the workpiece moving table 16. The length of the workpiece 6 can be changed if the length of the workpiece 6 changes.

The workpiece moving device 3 is configured to reciprocate the workpiece clamping device 2 in one direction, and includes the base 12 described above,
It consists of an air cylinder 13 and a workpiece moving table 16, which can be used to set the workpiece 6 at the set position (the right end in FIG. 1) and at the processing position of the workpiece 6 (the left end as shown in FIG. 1). The workpiece 6 can be moved automatically.

As shown in FIGS. 1, 2, and 5, the drilling unit 4 includes a hydraulic cylinder 21, a punch 22, and a die 23. The hydraulic cylinder 21 is connected to an oil pipe 2.
The main body 28 is connected to a high-pressure hydraulic pump 25 through a piston rod 26, and a punch 22 is fixed to the piston rod 26, and the main body 28 is fixed to a processing unit base 31 that can freely rotate around a rotation center 30 and slide vertically The die 23 is similarly fixed to the core processing unit stand 31.

The free indexing device 5 rotates the hole drilling unit 4 in the vertical direction (
It can be moved in the rotation direction (Z direction in Figure 1), the left/right direction (X direction in Figure 1), and the front/rear direction (Y direction in Figure 1) and stopped at any position. , an air cylinder 32 for vertical movement, an air cylinder 33 for rotation, and a stepping motor 34 for horizontal movement.
The main parts include a feed screw 35, a stepping motor 36 for longitudinal movement, and a feed screw 38.

The air cylinder 32 for vertical movement is fixed to the processing unit base 31, and the piston rod 39 is connected to the fixed base 4.
0, and the piston rod constitutes a rotation center 30 (17). The fixed base 40 is fixed on the movable base 4 in the front and back direction.

The air cylinder 33 for rotation is pivotally attached to a movable table 41 in the front-rear direction by a pin 42, and its piston rod 43 is pivotally attached to the arm 31a of the processing unit table 31 by a pin 44. The stepping motor 34 for movement is fixed to a base 46 having a guide rail 45 via a bracket 48, and a feed screw 35 is fixed to its rotating shaft 49. It is screwed into a female thread (not shown). Further, a windmill-shaped rotary plate 51 is fixed to one end 35a of the feed screw 35 for detecting an abnormality in the amount of feed of the moving table 50 by the feed screw, and an abnormality in the rotation speed of the rotary plate 51 is fixed to the base 46. Photo sensor 5 that measures the value and inputs it to the control device
2 are fixed facing each other.

A stepping motor 36 for forward and backward movement is fixed to a movement base 54 in the left and right direction and has an east gate rail 53 via a bracket 55.
8 is screwed into a female threaded portion (not shown) of the moving table 41 in the longitudinal direction, and a rotating body (not shown) similar to the rotating body 51 is fixed to one end (not shown) of the rotating body 8. And the moving table 41
is slidably fitted into the guide rail 53, and the movable table 50 is fitted into the guide rail 45, respectively.

Further, as shown in FIGS. 1 and 2, two identical sets of the drilling unit 4 and the free indexing device 5 are provided with the workpiece 6 at the center, and the diagonal line of the workpiece 60 is the boundary. The work can be divided and the same work can be done in parallel.

The control device is equipped with a microcomputer (not shown), and is configured to control the operation of each of the above devices using a predetermined program.

Function The present invention is constructed as described above, and its function will be explained below. Before the automatic thin plate drilling device 1 is started, the workpiece clamping device 2 is at the workpiece 6 setting position. Accordingly, the air cylinder 18 is activated to move the piston rod 19 according to the length of the workpiece 6, and the movable clamp member 8B is set at an appropriate position. Then, when the workpiece 6 is placed on the clamp member 8,
The bent portion 6C of the flange portion 6b engages with the clamp groove 9 between the clamp piece 10 and is firmly supported.

When the start button (not shown) of the control device is pressed, the air cylinder 13 of the workpiece moving device 3 is activated, its piston rod 14 protrudes, the workpiece moving table 16 moves to the left in FIG. 1, and the workpiece is clamped. The device 2 and the workpiece 6 move to the processing position and stop at the position shown in FIG.

At this time, the free indexing device 5 moves the bunch 22 and die 23 of the drilling unit 4 on the near side in FIG. 22 and die 23
The indexing is performed so that they are respectively positioned at the opposite start position 155.

When this indexing is completed, the processing unit base 31 of the drilling processing unit 4 is moved up and down appropriately by the operation of the air cylinder 32 to determine the vertical position, and then the hydraulic cylinder 21
The high-pressure hydraulic pump 25 is also operated by the supplied pressure oil, and the piston rod 26 is lowered to move the bunch 22 to the die 2.
3 to make a hole of a predetermined diameter in the flange portion 6b of the workpiece 6. There is no burr in the hole after machining, and there is no need for subsequent corrections, and a clean hole can be completed in one go.

Next, the stepping motor 36 rotates, the feed screw 38 moves the moving table 41 backward, and the stepping motor 3
4 rotates, and the feed screw 35 moves the moving table 50 to the left. Abnormalities in these moving amounts are detected by the rotating plate 51 and the photosensor 52, and if an abnormality is detected, the stepping motors 36 and 34 are stopped. If there is no abnormality, it rotates by the specified number of rotations and returns to the second position 56°15.
When the rotation speed corresponding to 6 is reached, the stepping motor 36
．． 34 is stopped and each drilling unit 4 is indexed to the second position 56,156.

Then, drilling is performed in the same manner.

From the third position 57 to the seventh position 61 on the near side, and on the opposite side, the third position 15
Up to 7, linear indexing is performed only by rotating the stepping motor 34. However, on the front side, the clamp member 8A becomes an obstacle when moving to the 8th position 62, and on the opposite side, the clamp member 8A becomes an obstacle when moving to the 8th position @15.
Since the clamp member 8A becomes an obstacle when moving to 8,
Each stepping motor 36 rotates and the feed screw 38
The moving table 41 moves the drilling unit 4 once backward, and after passing the clamp member 8A, moves it forward again.

Similarly, the air cylinder 33 of the drilling unit 4 remains inoperative from the 9th position 63 to the 15th position 69 on the near side, and from the 5th position 159 to the 15th position 169 on the opposite side. In other words, the processing unit 4 continues indexing and drilling while remaining in the same direction without rotating.

Then, when moving to the 16th position 70 on the front side, and when moving to the 16th position 170 on the opposite side, the air cylinder 33 is activated for the first time, and the processing unit base 31 is moved by the piston lid 43 to the rotation center 30. The tool is then rotated 90 degrees clockwise in FIG. 1, and indexing and drilling proceed in the same manner up to the final 18th position 72.degree. 172, and all drilling is completed.

Then, the drilling unit 4 is separated from the workpiece 6, and the workpiece 6 is returned to the set position of the workpiece 6 by the workpiece moving device 3. Then, when the operator places the unprocessed workpiece 6 on the workpiece support device 2 and presses the start button, indexing and drilling are performed in the reverse order to the above, and each drilling unit 4 is placed at the 18th position. Drilling is performed sequentially from 72,172 to the start position 55°155. Note that it is clear that the program may be such that each drilling unit 4 is returned to the starting position 55, 155 each time the workpiece 6 is finished machining.

Furthermore, when the type of workpiece 6 changes, completely different indexing and drilling operations can be performed simply by expanding and contracting the workpiece clamping device 2 and changing the control device program. 6 can be easily drilled.

Effect 13 - Since the present invention is configured and operates as described above, a punching method using a punch and a die is adopted for drilling a thin plate, and the punching processing unit of the punch and die is driven. uses a high-pressure ram and a high-pressure hydraulic pump, and a free indexing device that allows the drilling unit to move freely in the vertical direction, rotational direction, front-back direction, and left-right direction, and to stop it, is controlled by a control device incorporating a microcomputer. Since it is operated by a stepping motor, an air cylinder, etc., if a specific program is created for each type of thin plate work, when the type of work changes, the program can be simply replaced. This eliminates the need for press dies, which simplifies setup work and reduces drilling costs, and also eliminates the need for storage for idle press dies. Many effects can be obtained, such as the effective use of venue space. In addition, since a punching process is used, it is possible to freely punch clean holes in the thin plate. Furthermore, since the workpiece clamping device is configured to be extendable and retractable, the same clamping device can be used even if the type of workpiece changes.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention, and FIG. 1 is a perspective view of an automatic thin plate drilling device, FIG. 2 is a plan view of the automatic thin plate drilling device on the near side, and FIG. 3 is a mutual relationship between a workpiece clamping device and a workpiece. FIG. 4 is a plan view showing the indexing of the drilling position of the workpiece, and FIG. 5 is a side view of the drilling unit. 1 is a thin plate automatic drilling device, 2 is a work clamp device, 3
is a workpiece moving device, 4 is a drilling unit, 5 is a free indexing device, 6 is a workpiece, 6a is a drilling unit, 8, 8A
, 8B is a clamp member, 21 is a hydraulic cylinder, 22 is a punch, and 23 is a die.

Claims (1)

[Claims] The present invention includes a work clamping device provided with a plurality of clamp members for supporting a hole-drilling portion of a thin plate workpiece, a workpiece moving device that reciprocates the workpiece clamping device in one direction, and a punch and die driven by a hydraulic cylinder. A drilling unit that performs drilling on the workpiece using a punch and a die, and a free indexing device that moves the drilling unit in the vertical direction, rotational direction, left-right direction, and front-rear direction and stops it at an arbitrary position. and a control device that controls the operation of each of these devices according to a predetermined program.