JPH0357298Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a drilling device for sheet metal parts.

<Prior art> When drilling holes on a circular arc line such as the periphery of a wheel house such as a front fender of a car, a plurality of holes are drilled at a plurality of drilling positions on the circular arc line H of the workpiece W as shown in Fig. 5. This is done by arranging punch units 1 in parallel.

As shown in FIG. 6, the conventional punch unit 1 used for making the above-mentioned holes has a punch 3 mounted on a C-shaped frame 2 so as to be movable forward and backward in the axial direction, and a punch die 5 into which the punch 3 is inserted is fixed. However, a cylinder 4 was fixed to the rear end of the punch 3, and the punch 3 was moved forward and backward by the cylinder 4 to punch a hole in the workpiece W.

<Problems to be Solved by the Invention> In the conventional device described above, since the cylinder 4 is installed on the axis of the punch 3, the total length L in the axial direction becomes longer by the length of the cylinder. Therefore, when a plurality of punch units 1 are arranged and fixed along the arc line H as shown in FIG.
Punch unit 1
The driver missed the interference in the directions of arrows A and B to avoid interference.
Therefore, a release mechanism for the punch unit 1 is required, which complicates the configuration, and each punch unit 1 requires a cylinder 4, which only increases the complexity of pressure fluid piping, control equipment, piping, etc. However, equipment costs are becoming more expensive.

<Means for solving the problems> The present invention provides a drilling device that solves the above-mentioned conventional problems, and its characteristic configuration is as follows.
A plurality of punch units each having a punch that moves forward and backward in the axial direction and a punch die into which the punch is inserted are arranged radially at drilling positions on an arc line, and the rear end of the punch is arranged in an axial direction perpendicular to the punch axis. A cam device is provided for converting and transmitting the operating force of the punch in the direction of the punch axis, and a swing arm is provided at the radial center position of the punch unit to be indexed and rotated to a cam device position at the rear end of each punch unit by a rotary actuator. A cylinder is fixed at the tip of this swing arm in an axial direction perpendicular to the punch axis, and the piston rod of this cylinder can be successively adapted to the cam device of each punch unit.

<Operation> With the above configuration, the cylinder at the tip of the swing arm is indexed and rotated to correspond to the piston rod in the cam device of each punch unit, and a plurality of punch units are sequentially operated by one cylinder.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In Figure 1, W is the workpiece, H
is the workpiece drilling surface on the arc line. Reference numeral 10 denotes punch units arranged radially in parallel along the workpiece drilling surface H.

The structure of this punch unit 10 will be explained with reference to FIG. A bracket 11 is fixed on a base 27, and a frame 12 is fixed to this bracket 11. The frame 12 includes a punch 13 that is movable forward and backward in the axial direction, and a punch die 14 into which the punch 13 is fitted. A cam device 1 for moving the punch 13 forward and backward at the rear end of the punch 13
5 are equipped. This cam device 15 includes a passive cam 16a that is integrated with the rear end of the punch 13, an active cam 16b that is in contact with the passive cam 16a, and moves forward and backward in an axial direction perpendicular to the axis of the punch 13, and a passive cam 16a that constantly moves the passive cam 16a. It is composed of a spring 28 that pushes in the backward direction.

As described above, the punch unit 10 in the apparatus of the present invention is composed of three elements: the punch 13, the punch die 14, and the cam device 15.The cam device 15 of each punch unit 10 is explained below.
The workpiece W is drilled by sequentially operating the piston rods 20 of the two cylinders 19.

The operating device of the punch unit 10 will be explained. As shown in Figure 1, each punch unit 1
Rotary actuator 1 is placed at the radiation center position of 0.
Install 7. 18 is rotary actuator 1
7 is a rotating arm that sequentially indexes and rotates each punch unit 10, and a cylinder 19 is installed at its tip in the same axial direction as the active cam 16b. 20 is the piston rod 20,
It comes into contact with the lower end surface of the active cam 16b. In FIG. 2, 21 is a backup plate installed on a base 27 directly below the cylinder 19, and 22 is a roller that supports the swing arm 18 in a sliding manner.

Next, the operation of the above configuration will be explained. As shown in FIG. 1, the punches 13 of the radially arranged punch units 10 are brought to their original position at the backward end by a spring 28.

The rotating arm 18 is a rotary actuator 17
As a result, it pivots in either the left or right direction in FIG. 1 and is indexed to each punch unit 10. For example, as shown in FIG.
When drilling from the hole, the piston rod 20 of the cylinder 19 comes into contact with the lower end surface of the active cam 16b of the cam device 15, as shown in FIG. Then, the cylinder 19 is actuated to move the piston rod 20 upward and push up the active cam 16b. As a result, the punch 13 moves forward via the passive cam 16a to punch a hole in the workpiece W. The punch 13 is moved by the spring 2 due to the downward movement of the piston rod 20.
8, it is moved backward and returned to its original position, completing the drilling. The pivot arm 18 then indexes and pivots into the adjacent punch unit 10 and operates as described above to punch a hole. In this way, the cylinders 19 of the swing arm 18 are sequentially indexed to the plurality of punch units 10 to perform predetermined hole drilling.

3 and 4 show other embodiments of the present invention. The embodiments shown in FIGS. 1 and 2 above are for drilling on the workpiece drilling surface H using concentric arc wires centered on the rotary unit 17, but other embodiments are for drilling workpiece holes using non-concentric arc wires. This makes it possible to drill holes on the surface H1.

In this case, the workpiece drilling surface H1 of the non-concentric arc wire
A copying cam 24 corresponding to the following is installed at the movement locus of the tip of the swing arm 18. In addition, the rotating arm 18
is an ecorise fitting 23 with a spring 26.
A movable arm 18a is provided so as to be able to move forward and backward, and a follower roller 25 that contacts the copying cam 24 is attached to this movable arm 18a. cylinder 1
9 is installed on the movable arm 18a. Therefore, the movable arm 18a moves forward and backward based on the shape of the copying cam 24 by the rotation of the rotation arm 18, and the piston rod 20 moves toward the workpiece drilling surface H of the non-concentric circular arc.
1, the cam device 15 of the punch unit 10 is arranged along the cam device 15 of the punch unit 10.

<Effects of the Invention> As described above, according to the device of the present invention, the mechanism for advancing and retracting the punch is a cam device, and this cam device is operated by the piston rod of the cylinder provided at the tip of the swing arm. Multiple punch units can be operated with one cylinder, reducing the number of cylinders, piping, control equipment, wiring, etc., simplifying the equipment and reducing equipment costs. Also, since no cylinder is installed in the punch unit, The overall length of the punch unit in the axial direction is shortened, which eliminates interference when multiple punch units are arranged in parallel in the radial direction, and the punch unit is of a fixed type, which has the advantage of eliminating the need for a complex relief device. .

[Brief explanation of the drawing]

Figure 1 is a plan view of the present invention, Figure 2 is Figure 1-
3 is a plan view showing another embodiment of the present invention, FIG. 4 is a sectional view taken from FIG. 3, FIG. 5 is a plan view of a conventional device, and FIG. 6 is a plan view showing another embodiment of the present invention. FIG. 10...Punch unit, 11...Bracket, 12...Frame, 13...Punch, 14...
... Punch die, 15 ... Cam device, 17 ... Rotary actuator, 18 ... Swivel arm, 19
...Cylinder, 20...Piston rod.

Claims (1)

[Scope of utility model registration request] A plurality of punch units each having a punch that moves forward and backward in the axial direction and a punch die into which the punch is inserted are arranged radially at drilling positions on an arc line, and the rear end of the punch is arranged in an axial direction perpendicular to the punch axis. A cam device is provided for converting and transmitting the operating force of the punch in the direction of the punch axis, and a swing arm is provided at the radial center position of the punch unit to be indexed and rotated to a cam device position at the rear end of each punch unit by a rotary actuator. A drilling device characterized in that a cylinder is fixed at the tip of the swing arm in an axial direction perpendicular to the punch axis, and the piston rod of the cylinder can be successively adapted to the cam device of each punch unit.