JPH0242342Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a method for drilling or not drilling holes when continuously feeding workpieces are placed on a press machine one after another and pressed. The present invention relates to a punch retainer device for presses used for.

[Prior art] Press punch 9 used for punching holes in iron plates
As shown in FIGS. 7 and 8, the cylindrical portion 9b has a stepped base portion 9a at the upper end thereof, and the base portion 9a is further provided with an upwardly inclined surface 9c.

For example, a windshield wiper may be optionally attached to the back window of an automobile. In other words, a hole for attaching a rear windshield wiper may or may not be drilled in vehicle body parts that are being produced on the same production line.

In such a case, it is necessary to make the upper punch attached to the ram 14 of the press protrude or retract by the stroke.

In such a case, as shown in FIG.
You can move the special punch 9 forward to protrude the 8th punch.
As shown in the figure, move the cam plate 3 backward and punch the special punch 9.
It's trying to draw people in.

[Problems to be solved by the invention] In the conventional retainer device shown in FIGS. 7 and 8, during use with the punch 9 protruding, the cam plate 3 retreats due to impact or vibration, causing an error. It sometimes worked and produced defective products.

This invention aims to provide a punch retainer device for a press in which the cam plate is accurately held at the press position and malfunction of the punch due to buffering can be avoided.

Further, the punch retainer device according to this invention is intended to make it possible to use a cam plate by using a commercially available JIS standard flanged punch.

[Means for solving the problems] This will be explained with reference to FIGS. 1 to 5. The press punch retainer device according to this invention is
This punch retainer device for a press is configured such that when the cam plate 3 moves forward, the punch 8 protrudes from the lower surface of the retainer block 1 by a stroke amount, and when the cam plate 3 retreats, the punch 8 retracts into the retainer block 1 by the stroke amount. A deep lateral groove 1a in a direction perpendicular to the movement direction of both the cam plate 3 and the punch 8 is provided in the upper surface of the retainer block 1, and a press fitting hole 1b is provided in the deep lateral groove 1a, and a punch fitting hole is provided in the deep lateral groove 1a. A number of bottomed spring holes 1c...1c are provided at the bottom of the deep lateral groove at positions symmetrical to the virtual neutral plane determined by the virtual central axis of 1b and the moving direction of the cam plate 3, and compressed. A rectangular punch set block 2 is fitted with a deep lateral groove 1a by disposing a spring 10 so as to be able to move only up and down, a stepped hole 2a for a flanged punch 8 is provided in the punch set block 2, and a cam with a downward slope 3a is provided. Slope 2 corresponding to plate 3
c is provided on the punch set block 2.

[Example] 14 is a ram of a press, 1 is a retainer block attached to the ram 14, 1a is a deep lateral groove provided on the top surface of the retainer block 1, 1b is a punch fitting hole provided at the bottom of the deep lateral groove 1a, Reference numeral 1c denotes a bottomed hole for a spring provided at the bottom of the deep lateral groove 1a, in which a compression spring 10 is accommodated. 1d is a bottomed screw hole provided in the bottom of the deep lateral groove, and 1f is a screw hole provided in the upper surface of the retainer block.

2 is a punch set block to be fitted into the deep horizontal groove 1a, 2a is a stepped hole provided in the punch set block 2, and the columnar part 8b and base part 8a of the flanged punch 8 are
It is designed to fit. 2b is a stepped portion of the stepped hole 2a, 2c is an upward slope provided at the rear end of the punch set block 2, and 2d is a stepped portion of the punch set block 2.
There are stepped bolt holes provided on the left and right sides of the retainer block 1, and the tip of the bolt 11 inserted into the stepped bolt hole 2d is constructed so as to be planted in the bottomed screw hole 1d of the retainer block 1.

1e is a shallow vertical groove provided on the upper surface of the retainer block 1; 3 is a ram plate slidably fitted into the shallow vertical groove 1e; a downward slope 3a is provided at the front end of the ram plate; A positioning screw 4a is provided to determine the position.

Reference numeral 12 denotes a backing plate placed over the retainer block 1, which is secured by a bolt 15 screwed into a screw hole 1f, and covers the cam plate 3. 3b is an arm piece,
It is fixed to the rear end of the cam plate 3 in a hanging state by a bolt 3c.

5 is an air cylinder, which is fixed to the retainer block 1. 5a is air cylinder 5
The piston rod is connected to the arm piece 3b.

[Function] As shown in FIG. 2, when the air cylinder 5 is operated to move the piston 5a backward, the cam plate 3 comes off from the punch set block 2, and the compression spring 10
As a result, the punch set block 2 is raised and the punch 8 is retracted. In this state, the workpiece 13 is not punched.

As shown in FIG. 1, when the air cylinder 5 is actuated to advance the piston 5a, the downward slope 3a of the cam plate 3 contacts the slope 2c of the punch set block 2, pushing down the punch set block 2, and 8 is also pushed down. In this state, the workpiece 13 is punched.

[Effects of the invention] The present invention does not require a special punch such as the punch 9 having an upwardly inclined surface 9c at the top, as in the conventional retainer device shown in FIGS. 7 and 8. A standard flanged punch 8 can be used, and the cost of the punch can be significantly reduced.

Further, as shown in FIG. 4, by increasing the number of stepped holes 2a and punch fitting holes 1b, a plurality of punches 8 can be set at the same time.

[Brief explanation of drawings]

1 to 3 show one embodiment of the press punch retainer device according to this invention, and
The figure is a vertical side view in a drilling state, FIG. 2 is a vertical side view in a non-drilling state, and FIG. 3 is a partially exploded plan view. FIG. 4 is a partially exploded plan view of a modified example. 5 and 6 are side views of the press to which the punch retainer device is attached, FIG. 5 being a side view in a punching state, and FIG. 6 being a side view in a non-drilling state. FIGS. 7 and 8 show an example of a conventional press punch retainer device, with FIG. 7 being a vertical side view in a punching state, and FIG. 8 being a vertical side view in a non-drilling state. 1... Retainer block, 1a... Deep lateral groove,
1b...Fitting hole for punch, 1c...Bottomed hole for spring, 1d...Bottomed screw hole, 1e...Shallow vertical groove, 1f
...Screw hole, 2...Punch set block, 2a...
...Stepped hole, 2b...Stepped part, 2c...Slope, 2d...
...Stepped bolt hole, 3...Cam plate, 3a...Downward slope, 3b...Arm piece, 3c...Bolt, 4a...
Positioning screw, 5...Air cylinder, 5a...
...Piston, 8...Punch, 8a base, 8b...
Columnar part, 9... punch, 9a... base, 9b...
Cylindrical portion, 9c...Upward inclined surface, 10...Compression spring, 11...Bolt, 12...Bucking plate, 13...Workpiece, 14...Ram, 15...
bolt.

Claims (1)

[Claims for Utility Model Registration] When the cam plate 3 moves forward, the punch 8 protrudes from the lower surface of the retainer block 1 by the stroke amount, and when the cam plate 3 retreats, the punch 8 retracts into the retainer block 1 by the stroke amount. In the constructed punch retainer device for a press, a deep lateral groove 1a in a direction perpendicular to the moving direction of both the cam plate 3 and the punch 8 is provided in the upper surface of the retainer block 1, and a punch fitting hole 1b is provided in the deep lateral groove 1a. A plurality of bottomed spring holes 1c are provided at the groove bottoms of the deep lateral grooves at positions symmetrical to the virtual neutral plane determined by the virtual central axis of the punch fitting hole 1b and the moving direction of the cam plate 3. 1c is provided, a compression spring 10 is arranged, a rectangular punch set block 2 is fitted into the deep lateral groove 1a so as to be able to move only up and down, and a stepped hole 2a of the flanged punch 8 is inserted into the punch set block 2. A punch retainer device for a press, characterized in that a punch set block 2 is provided with an inclined surface 2c corresponding to a cam plate 3.