JPH0528706Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a pressure molding die used as a tool for crimping contacts onto a cable. More specifically, this invention is a die for pressure molding used as a tool for crimping contacts onto a cable. More specifically, this invention is a die for pressure molding used as a tool for crimping contacts onto a cable. The present invention relates to a pressure molding die used in a crimping tool used to simultaneously press and mold the outer shape of both workpieces into a polygonal shape.

[Background of the invention] When the outer shape of a workpiece is pressure-formed into a desired shape using a hand tool or a press, a die is used to shape the workpiece into the desired shape.

For example, when connecting the shield wire of a coaxial cable with a cylindrical outer shape to the outer conductor of a coaxial connector, the outer shape is press-molded into a regular hexagon. In addition, the same applies when fixing an optical fiber cable to the outer sheath of an optical connector, or when connecting a general cable to a contact.

Conventionally, in this type of compression molding process, a recess is formed by dividing the desired shape into two parts.
Using a pair of dies, the workpiece is loaded into both recesses and a hand tool, such as diagonal pliers, is used.
The dies were crimped by applying pressure in two directions facing each other to both dies using a plier or a press device.

According to the pressurizing crimping operation of such conventional two-piece dies, the deformation of the workpiece may be different in the vertical and horizontal directions during crimping, or "burrs" may be formed on the workpiece at the contact area between a pair of dies. This often causes disadvantages such as impairing the crimped dimensions of the product.

In addition, the unbalance of deformation of the workpiece is
When crimp-molding the outer conductor of a coaxial cable, it also creates an unbalance in the internal shape of the workpiece.
This has a significant negative effect on insulation resistance. Furthermore, in the case of optical fibers, there is a problem that this leads to an increase in insertion loss.

[Purpose of the invention] Taking into consideration the many problems that need to be solved as described above, the purpose of this invention is to crimp electrical wires, optical cables, etc. to contacts using hand tools, and at the same time to determine the external shape of both workpieces. Pressure-forming tool used for crimping contacts onto cables, which has a simple structure when pressure-molding into a predetermined shape, and can form the workpiece by crimping accurately without creating burrs. It's about providing the dice.

[Structure of the invention] In order to achieve the above object, the pressure molding die of this invention consists of three parts,
By pressurizing the workpiece loaded into the die from two directions facing the die, the workpiece is caulked and formed from three directions.

Next, an example will be described in which the crimping die used in the tool for crimping contacts to a cable of this invention is used to crimp a contact to a coaxial cable and form the outer shape of the part into a regular hexagon.

As shown in Figure 1, a die 10 used in the tool for crimping contacts to the cable of this invention.
These are conventionally known and commonly used hand tools, such as an upper block 12 and a lower left block disposed between the jaws of opposing pliers or between the movable side mounting plate and the fixed side mounting plate of a pressure press. 14 and a lower right block 16.

These blocks 12, 14, 16 have opposing inner surfaces that are respectively press-molded workpieces (in this example, a coaxial cable 18 is connected to a contact 20).
the desired external shape (in this example, a regular 6
A rectangular shape) is formed into molding recesses 22, 24, and 26 whose contours are divided into three parts from the center point.

According to this invention, the aforementioned three blocks 1
Molding recess 2 formed by combining 2, 14, 16
2, 24, 26 and applying pressure in the vertical direction to the upper block 12 and both the left and right lower blocks 16, 18, the upper block 12 moves in the direction of the left and right lower blocks 16, 18. At the same time, the lower left block 14 and the lower right block 16 are moved inwardly, and the workpiece placed therein is pressurized from three directions to form a desired external shape.

For this purpose, the molding recess 2 of the upper block 12 is
Fixing planes 28 and 29 are formed by extending outward in the horizontal direction from both ends of the fixing planes 28 and 29, respectively, and an actuator extending outwardly and downwardly at an angle of 45 degrees from the outer ends of these fixing planes 28 and 29. The slopes are 30 and 31.

The angle of inclination of these operating slopes 30 and 31 is approximately 30
It can operate accurately even at a temperature of about 80 degrees.

The shapes of the lower left block 14 and the lower right block 16 are mirror-symmetrical to each other, and the respective molded recesses 2
4, 26 have fixing planes 32, 34 extending horizontally outward from their upper ends, and fixing planes 33, 35 extending vertically from their lower ends.

Also, a sliding slope 3 is inclined downward from the outer ends of the fixing planes 32, 34 of the left and right lower blocks 14, 16 and comes into contact with the operating slopes 30, 31 of the upper block.
8.40.

The angle of inclination of these sliding slopes 30, 34 is selected according to the angle of the operating slopes 30, 31 of the upper block 12.

In addition, as shown in Fig. 2, the left and right lower dice 1
By disposing a spring 42 between the facing vertical fixing planes 33 and 35 of 4 and 16, the left and right lower dies 1 can be moved when the pressure is released after molding pressure is applied.
4 and 16 separate from each other, and at the same time upper die 1
2 can also be separated and automatically returned to the open position.

[Operations and effects of the invention] In the pressure forming die 10 used as a tool for crimping contacts to cables of this invention,
Since it is constructed as described above, the center surrounded by the forming recesses 22, 24, 26 of these three blocks 12, 14, 16 installed between the jaws of a hand tool or attached to a press machine. When a workpiece is loaded into the opening and pressures in opposite directions are applied between the upper block 12 and the left and right lower blocks 14, 16, the operating slopes 30, 30 of the upper block 12,
31 and the sliding slopes 38, 4 of the left and right lower blocks 14
0, the left and right lower dice 14 and 16 mutually move inward due to the force relationship shown in the vector diagram in FIG.
Fixing planes 28, 32, 29, 34, 33, 3
5 come into contact, the movement is completed, and the internal workpiece is pressed from three directions as shown in FIG. 3, forming it into a desired shape.

According to this invention, as is obvious from the detailed description above, the upper block 1 consists of three pieces.
2 and the left and right lower blocks 14, 16 by applying pressure in two opposing directions from the outside,
These three blocks 12, 14, 16 can be moved inwardly to compress and mold the workpiece charged into these blocks, so that the workpiece can be compressed evenly from its periphery. pressure is applied,
The deformation of the workpiece will not become unbalanced.

Further, each block 12, 14, 16 has a respective fixing plane 28, 29, 32, 34, 33, and 3
5, the pressurizing operation is stopped by contact with the blocks 12, 14, 16 during molding.
There is no risk of burrs or the like occurring on the molded workpiece due to problems such as misalignment of the molding recesses 22, 24, and 26.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view for explaining an embodiment of a pressure molding die used in a tool for crimping contacts to a cable of this invention, and Fig. 2 shows crimping when a workpiece is inserted inside. The previous front view, FIG. 3, is a front view showing the state after the crimping shown in FIG. 2 and is a combination of force vector diagrams. The main reference numbers in the drawings are listed below. 10...Die for pressure molding, 12...Upper block, 14...Left lower block, 16...Right lower block, 18...Coaxial cable, 20...Contact, 22, 24, 26...Molding recess place, 2
8, 29, 32, 33...Fixing plane, 30, 3
1, 38, 40... slope, 35, 36... vertical plane, 42... spring.

Claims (1)

[Claims for Utility Model Registration] 1. Dies to be attached to the pressurizing part of a tool for crimping contacts to cables should be machined on the upper block, the lower left block, the lower right block, and the mutually opposing inner surfaces of the blocks. The contour of the object after desired molding is divided into three parts from the center point, and the blocks are provided with inclined surfaces that contact each other, and the upper block and the left and right lower blocks are pressed by means of pressurizing means. A tool for crimping a contact to a cable, characterized in that each block presses and forms a workpiece inserted into a recess of the block from three directions by applying opposing forces in a linear direction. Pressure molding die used. 2. Providing a plane extending horizontally outward from both ends of the recess of the upper block, providing a plane extending horizontally outward from one end of the recess of the left and right lower blocks, and further providing a plane extending horizontally outward from both ends of the recess of the left and right lower blocks 2. A pressure molding die for use in a tool for crimping a contact to a cable according to claim 1, further comprising a flat surface extending vertically downward from the other end of said recess. 3. The tool for crimping a contact to a cable according to claim 1, wherein the inclined surfaces of each of the blocks that contact each other extend outwardly and downwardly at an angle of about 30 to about 80 degrees from the outer edge of the flat surface. Pressure molding dies used for. 4. A pressure molding die used in a tool for crimping a contact to a cable according to claim 1, wherein the angle of the inclined surface is 45 degrees. 5. A pressure molding die for use in a tool for crimping contacts to a cable according to claim 2, further comprising a spring disposed between a vertical plane of said lower left block and a vertical plane of said lower right block.