JPH0123638Y2 - - Google Patents

Description

[Detailed description of the invention] This invention utilizes a cam with an oblique cam surface to convert the downward pressing force of a press machine into a horizontal pressing force (in the direction of the cam surface) for drilling, shearing, and bending. The present invention relates to a press cam mold for machining processes such as the like, and in particular to a press cam mold with a reduced width suitable for machining areas where machining space is small, such as curved parts of a workpiece.

Conventionally, as a cam type for this type of press, for example, as disclosed in Japanese Utility Model Application No. 55-28023,
The cam slide is reciprocated in the lateral direction in conjunction with the vertical movement of a cam driver disposed on the upper die, and pressing is performed using a punch or the like attached to the cam slide.

In order to ensure stability during operation of these press cam types, in other words, to reduce vibration of the punch, etc., the cam slide is held by a cam guide with a U-shaped cross section and side plates along the moving direction. This prevents the cam slide from swinging laterally and from falling in a direction perpendicular to the direction of movement.

Therefore, when ensuring the required load area of the cam slide (the size of the sliding surface that allows the cam slide to move smoothly) and considering the machining accuracy of the guide surface,
The width dimension of the cam guide, so-called cam type, that can be inevitably manufactured is determined.

However, this cam mold does not cause any problem if the workpiece has sufficient machining space, but if the machining space is small and multiple cam molds are installed adjacently, the width dimension of the cam mold of this embodiment is large. There is a problem that it is difficult to apply it to such uses.

The present invention was developed in view of these problems, and it secures the necessary load area of the cam slide, reduces the width dimension, prevents the cam slide from swinging and overturning during operation, and further improves the cam driver. The technical objective is to obtain a cam mold for presses that can be applied to small processing spaces by restraining the cam slide from lifting up when pressurized. The present invention adopts the following technical means (configurations) to solve the above problems.

That is, a cam guide fixed to the lower mold, a cam slide movably arranged on the cam guide and having an oblique cam surface at one end, and a cam slide fixed to the upper mold and in surface contact with the cam surface of the cam slide. In a press cam mold, which has a cam surface at the bottom and a cam driver that moves the cam slide in the direction of the cam surface on a cam guide as the upper mold moves in the vertical direction, the cam slide has a cam surface and a cam driver. A recess into which a coil spring for return is inserted is provided on the end face facing the back, and a recessed groove along the moving direction of the cam slide is formed on the side perpendicular to the cam surface, and the cam guide is connected to the cam. a base on which a slide is placed and a guide surface for slidingly guiding the slide;
The base is provided with side walls protruding from both ends in the direction of movement of the cam slide, and the upper ends of the side walls are provided with stepped portions that match the grooves provided in the cam slide. A fixing hole is formed on one side, and a pin is fixed to the fixing hole to fit into a coil spring arranged in a recess of the cam slide.

Side plates fixed to stepped portions provided on the side walls of the cam guide are fitted into the concave grooves of the cam slide arranged on the guide surface of the cam guide, and the side plates are used when the cam slide moves. The structure adopts a structure that prevents sideways vibration, overturning, and floating.

By adopting the above-mentioned technical means, the present invention achieves the following effects.

In other words, a groove is formed on the side surface of the cam slide along the direction of movement of the cam slide, and a side plate fixed to the cam guide is fitted into the groove, so that the side plate can move when the cam slide moves. This prevents sideways shaking and overturning. Furthermore, since the side plate is located in the side groove of the cam slide, the width can be reduced without reducing its load area, and it can be applied to small machining spaces.

Further, since the side plate is fitted into the groove of the cam slide, it is possible to restrain the cam slide from floating up when one end is pressurized by the cam driver.

Furthermore, since the structure can be simplified, manufacturing is facilitated, and other practical effects are achieved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes a cam driver fixed to an upper die (not shown), and the cam driver 1 is provided with a diagonal cam surface 2 at the bottom of one end with a narrowed tip, and two upper ends along the direction of the cam surface 2. Flange portions 3, 3 for attachment are formed on.

4 is a bolt hole for mounting provided in the flange portion 3; 5 is a sliding surface formed on the surface of the cam driver 1 facing away from the cam surface 2; and the sliding surface 5 is provided with appropriate lubricating means. It is something that is administered. As these lubrication means, for example, a solid lubricant embedded, a bearing alloy material coated, or a combination of these are suitable.

Reference numeral 6 denotes a cam slide which has a cam surface 7 at one end that is in surface contact with the cam surface 2 of the cam driver 1, and the cam slide 6 has a return function at the lower part of the end surface 8 facing away from the cam surface 7 to which the processing tool is attached. coil spring 9
A recess 10 into which is inserted is provided.

11, 11 are side surfaces perpendicular to the cam surface 7,
Concave grooves 12, 12 are formed in the side surfaces 11, 11 along the moving direction of the cam slide 6 (in the direction of the cam surface 7), into which side plates, which will be described later, fit and slide.

Reference numeral 13 indicates an engagement hole provided through the side surfaces 11, 11, and reference numeral 14 indicates a buffer provided at the lower end of the cam surface 7, connected to the cam surface 7, and on a vertical wall 15 formed parallel to the end surface 8. This pad 14 is for standing wall 1.
It is fitted into a recess 16 provided in 5 with a part thereof protruding.

17 is the lower surface of the cam slide 6;
comes into sliding contact with the guide surface of the cam guide, which will be described later.

Appropriate lubrication means are applied to the cam surface 7 of the cam slide 6 that slides on the cam surface 2 of the cam driver, the groove 12 that slides on the side plate, and the lower surface 17 that slides on the guide surface of the cam guide. . As these lubrication means, for example, embedding a solid lubricant, coating a bearing alloy material, or a combination of these is suitable.

18 is a cam guide fixed to the lower mold (not fixed), and the cam guide 18 has a cam slide 6 on the upper surface.
A base 20 having a smooth guide surface 19 on which the cam slide 6 is placed and slidably guided; and side walls 2 provided protruding from the base 20 at both ends in the direction in which the cam slide 6 moves.
1,21.

Reference numerals 22, 22 are stepped portions provided at both upper ends of the side walls 21, 21, and the stepped portions 22 are aligned with the grooves 12 of the cam slide at positions perpendicular to the moving direction and the lateral direction of the cam slide 6. It is formed like this.

Reference numerals 23 and 23 denote bolt holes provided in the stepped portion 22, and the bolt holes 23 are formed to pass through the stepped portions 22 at both ends. 24 is a bolt hole 23 in the stepped portion 22.
This is a pin hole provided parallel to the

Reference numeral 25 denotes a fixing hole having a screw portion provided in one side wall 21, and the fixing hole 25 is formed so that its axis coincides with the recess 10 of the cam slide.

A pin 26 has one end screwed into the fixing hole 25, and the other end of the pin 26 is inserted into the recess 1 of the cam slide.
0, and guides the expansion and contraction of the coil spring 9.

Numerals 27 and 27 are bolt holes provided in the base 20 for fixing the cam guide 18 to the lower mold, and 28 is a groove formed in the lower mold on a surface of the base 20 facing away from the guide surface 19. The keyway 28 is provided with a key for preventing the cam guide 18 from moving laterally.

Reference numerals 29 and 29 denote a pair of side plates fixed to the stepped portion 22 of the cam guide 18, and the cam slide 6 is slidably fitted into the groove 12 of the cam slide 6. Screw holes 30, 30 and seat holes 31, 31 are provided alternately between the side plates 29 at positions that match the bolt holes 23 formed therein.

Reference numeral 32 denotes a pin hole provided in the side plate 29, and the pin hole 32 is formed at a position that matches the pin hole 24 provided in the step portion 22.

33 is a spacer fitted into the play hole 13 of the cam slide, and the spacer 33 is attached to the side plates 29, 2.
9 to suppress deformation of the side plate 29 due to the fall of the cam slide 6.

34 is a bolt hole provided on the end face of the spacer 33; 35 and 36 are screw holes and seat holes provided in the side plate 29 at positions that match the bolt holes 34 of the spacer; the screw holes 35 and the seat holes 36 are The side plate 2
9 are formed in alternating correspondence.

37, 37 are bolts for fixing the side plate 29 to the cam guide 18 and the spacer 33;
7 is arranged by fitting into the bolt holes 23, 34 of the cam guide 18 and the spacer 33 through the seat holes 31, 36 of the side plate, and is screwed into the screw holes 30, 35 corresponding to the seat holes 31, 36 of the side plate 29. .

Numerals 38 and 38 are dowel pins driven into the pin holes 24 and 32 of the side plate 29 and the cam guide 18 to position the side plate 29 on the cam guide 18.

Next, the assembly and operation of the press cam die constructed as described above will be explained.

That is, to assemble a press cam die, the cam guide 18 is fixed to the lower die of the press machine, the cam slide 6 is placed on the guide surface 19 of the cam guide 18, the coil spring 9 is inserted into the recess 10, and the coil spring 9 is inserted into the recess 10.
is placed so that its lower surface 17 is aligned with the fixing hole 25 of the cam guide, and a pin 26 is fixed in the fixing hole 25 by fitting one end of the pin into the coil spring 9.

Next, the side plate 29 is fitted into the groove 12 of the cam slide, and the spacer 33 disposed in the play hole 13 and the stepped portion 22 of the cam guide 18 are fixed with bolts 37, and the cam driver 1 is mounted on the upper die of the press machine. This is done by fixing it to

The operation of the cam mold assembled in this way is such that the cam driver 1 fixed to the upper mold descends together with the ram of the press machine (in the direction of arrow a in the figure).
Then, the cam surface 2 of the cam driver 1 descends while slidingly contacting the cam surface 7 of the cam slide 6, and the sliding surface 5 of the cam driver 1, which is opposite to the cam surface 2, slidingly contacting the inner surface of the side wall 21 of the cam guide.

Then, as the cam driver 1 descends, the cam surface 7 of the cam slide 6 is pressed by the cam surface 2 of the cam driver, and the cam slide 6 moves in the lateral direction (forward direction, arrow b in the figure).
The coil spring 9 is guided by a side plate 29 fixed to the cam guide 18 in the direction of
Press to operate.

Next, by the forward movement of the cam slide 6, a processing tool (not shown) such as a punch is fixed to the front surface of the cam slide 6, in other words, to the end surface 8 of the cam slide opposite to the cam surface 7. , the workpiece is processed. Thereafter, when the cam driver 1 moves upward as the ram of the press machine rises, the cam slide 6 is disposed in the recess 10, moves backward by the elastic force of the coil spring 9 pressed during the forward movement, and is connected to the cam surface 7. The pad 14 arranged on the vertical wall 15 is brought into contact with the side wall 21 of the cam guide so as to buffer the movement thereof, and is returned to the position before operation (before operation), and by lowering the cam driver 1 again. It is operated to move forward.

In this embodiment, the respective sliding surfaces, namely the sliding surface 5 of the cam driver in sliding contact with the side wall 21 of the cam guide, the cam surface 7 of the cam slide in sliding contact with the cam surface 2 of the cam driver, and the side plate 29
Although the description has been made in terms of applying appropriate lubrication means to the concave groove 12 of the cam slide in sliding contact with the cam slide and the lower surface 17 of the cam slide in sliding contact with the guide surface 19 of the cam guide,
The lubricating means can perform its function even if it is placed on any of these members that are in sliding contact with each other, and its placement is not particularly limited.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal side view showing the cam die for press according to the present invention, Fig. 2 is a view taken in the direction of arrow C in Fig. 1, and Fig. 3 is a main part of the cam die for press according to the present invention. FIG. 1: Cam driver, 2, 7: Cam surface, 6: Cam slide, 8: End surface, 9: Coil spring, 10:
recess, 11: side surface, 12: groove, 18: cam guide, 19: guide surface, 20: base, 21: side wall, 2
2: Step part, 25: Fixing hole, 26: Pin, 29: Side plate.

Claims (1)

[Scope of utility model registration request] A cam guide fixed to the lower mold, a cam slide movably arranged on the cam guide and having an oblique cam surface at one end, and a cam surface fixed to the upper mold and in surface contact with the cam surface of the cam slide. at the bottom,
In a press cam die, which is composed of a cam driver that moves the cam slide in the direction of the cam surface on a cam guide as the upper die moves in the vertical direction, the cam slide has a return guide on the end face opposite to the cam surface. A recessed portion into which a coil spring is inserted is provided, and a recessed groove along the moving direction of the cam slide is formed on the side surface perpendicular to the cam surface, and the cam guide is provided with the cam slide on which the cam slide is placed. The cam slide includes a base having a guide surface for contacting and guiding the cam slide, and side walls protruding from both ends of the base in the direction of movement of the cam slide.
Steps are provided at both upper ends of the side wall to match the grooves provided in the cam slide, and a fixing hole is formed in one of the side walls, and a fixing hole is provided in the fixing hole, and a fixing hole is formed in the fixing hole. A pin that fits into a coil spring is fixed to the cam guide, and side plates fixed to stepped portions provided on the side wall of the cam guide are fitted into the grooves of the cam slide arranged on the guide surface of the cam guide. A cam type for presses that is characterized by: