CN105328290A - A wire cutting fixture - Google Patents

Abstract

The invention relates to a linear cutting tool fixture which comprises a base, a pressing device and a movable positioning pin, wherein a working hole for a cutting line to pass through is formed in the base; the upper part of the movable positioning pin is used for being inserted into a shaft hole of the workpiece blank and tightly matched with the shaft hole, the lower part of the movable positioning pin is used for being inserted into the working hole and tightly matched with the working hole, and the pressing device is used for pressing the workpiece blank on the bottom plate. The invention has simple structure, convenient and fast use and convenient manufacture, can quickly replace processed products and can realize the accurate positioning and compaction of workpiece blanks.

Description

A wire cutting fixture

technical field

The invention belongs to the field of mechanical tooling fixtures, in particular to the technical field of wire cutting tooling fixtures, in particular to the tooling fixtures of wire cutting machine for blanks with shaft holes.

Background technique

Wire cutting technology is a technology that uses a moving metal wire as a tool electrode, and passes a pulse current between the metal wire and the workpiece, and uses the corrosion effect of the pulse discharge to cut the workpiece.

In the current wire cutting technology, it is difficult to locate the blank by the wire cutting jig. As shown in Figure 1 and Figure 2, the square workpiece blank 1 has small holes 1-1, shaft holes 1-2 and wire cutting The threading hole 1-3 of the workpiece, on this workpiece blank 1, the shape 2-1 that is concentric with the small hole 1-1 and the shaft hole 1-2 and the workpiece 2 that forms an "8" shape with the shape 2-1 (As shown in Figure 3, 4), there are following problems when adopting wire cutting machine to process:

Due to the difficulty in positioning, it is difficult to ensure the coaxiality of the small hole 1-1, the shaft hole 1-2 and the shape 2-1, and there are many defective products, which causes loss of workpieces and low production efficiency.

Contents of the invention

The technical problem to be solved by the present invention is: in view of the above-mentioned existing problems, provide a kind of simple in structure, convenient and quick to use, easy to manufacture, and can replace the processing product fast and special jig for wire cutting, adopt this special jig for wire cutting, Accurate positioning and pressing of workpiece blanks can be realized.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a wire cutting fixture, which includes a base, a pressing device and a movable positioning pin, and the base is provided with a working hole for the cutting wire to pass through; the movable positioning pin The upper part of the movable positioning pin is used to insert into the shaft hole of the workpiece blank and fit tightly with the shaft hole, the lower part of the movable positioning pin is used to insert into the working hole and tightly fit with the working hole, and the pressing device is used to press the workpiece blank The material is pressed against the bottom plate.

In the above solution, the wire cutting fixture also includes a fixed positioning pin fixed on the base, and the fixed positioning pin is used for positioning the positioning end of the workpiece blank.

In the above solution, the wire cutting fixture also includes a handle, and the handle is fixedly arranged at the lower end of the movable positioning pin.

Compared with the prior art, the present invention has the following beneficial effects:

1. Since the base is equipped with a movable positioning pin to coordinate with the shaft hole of the workpiece blank, this makes the position of each workpiece blank on the base accurate, ensuring the accuracy of the shape of the wire cutting program. The pressing device presses the workpiece blank on the base so that the workpiece blank cannot be displaced during processing.

2. At the same time, a fixed positioning pin is provided to cooperate with one end surface of the workpiece blank, which makes the position of each workpiece blank on the base uniform and unique.

3. A handle is provided at the lower end of the movable positioning pin. After the pressing device compresses the workpiece blank, it is convenient to pull the movable positioning pin out from the bottom of the base through the handle.

Description of drawings

Figure 1 is a schematic diagram of the workpiece blank structure.

Fig. 2 is a left side view of Fig. 1 .

Fig. 3 is a schematic diagram of the structure of the cut and shaped workpiece.

Fig. 4 is a left side view of Fig. 3 .

Fig. 5 is a schematic structural diagram of an embodiment of the present invention.

FIG. 6 is a top view of FIG. 5 .

Fig. 7 is a left side view of Fig. 5 .

In the figure: 1 workpiece blank, 1-1 small hole, 1-2 shaft hole, 1-3 threading hole, 1-4 positioning end, 2 workpiece, 2-1 large arc shape, 2-2 small arc shape, 3 Base, 4 movable locating pins, 5 fixed locating pins, 6 tightening nuts, 7 tightening bolts, 8 support bolts, 9 pressure plates, 10 compression nuts, 11 working holes, 12 handles.

detailed description

The present invention will be described in further detail below in conjunction with accompanying drawing embodiment:

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The wire cutting workpiece fixture shown in Fig. 5, Fig. 6 and Fig. 7 includes a base 3, a pressing device, a fixed positioning pin 5, a handle 12 and a movable positioning pin 4, and the base is provided with a hole for the cutting wire to pass through. Working hole 11; the upper part of the movable locating pin 4 is used to insert into the shaft hole 1-2 of the workpiece blank 1 and closely fit with the shaft hole, and the lower part of the movable locating pin is used to insert into the working hole 11 and fit with the working hole 11 Tight fit, the pressing device is used to press the workpiece blank 1 on the bottom plate 3 . The fixed positioning pin 5 is fixed on the base 3, and the fixed positioning pin 5 is used for positioning the positioning end 1-4 of the workpiece blank. The handle 12 is fixedly arranged on the lower end of the movable positioning pin 4 .

The working principle of this embodiment is:

First, the shaft hole 1-2 of the workpiece blank 1 can be placed on the base, and cooperate with the movable positioning shaft 4, and the 1-4 positioning end surface of the workpiece blank 1 can be placed on the fixed positioning pin 5 on the base 3 to cooperate, and the After the workpiece blank 1 is positioned on the base 3, adjust the supporting bolt 8 and the tightening bolt 7 of the pressing device to ensure that the pressure plate 9 can be placed on the upper surface of the workpiece blank 1 in parallel. At this time, tighten the tightening nut 6, Ensure that the tightening bolt 7 cannot rotate. After the pressure plate 9 reliably presses the upper surface of the workpiece blank 1, tighten the compression nut 10 to make the pressure plate 9 compress the workpiece blank 1 on the bottom plate 3. At this time, the handle 12 will Movable positioning pin 4 is extracted from base plate 3 below. Pass the wire-cutting metal wire through the threading hole, perform conventional centering operations, and execute the wire-cutting program to process the shape according to the path A-B-C-D-E-F-G-H-I. The wire-cutting metal wire cuts the workpiece blank 1 in the working hole. After the cutting is completed, the processed The workpiece 2 is removed from the workpiece blank 1 .

Pull out the wire cutting metal wire from the threading hole, unscrew the compression nut 10 to release the pressure plate 9 from the workpiece blank 1, remove the workpiece blank 1 from the bottom plate 3, and insert the movable positioning pin 4 back on the bottom plate 3 , and another workpiece blank 1 to be processed can be positioned, installed, pressed and processed again as described above.

This fixture does not include the clamping plate device for fixing the wire cutting workpiece fixture to the working table of the wire cutting machine.

Claims (3)

1. a Linear cut frock clamp, is characterized in that: it comprises base, hold down gag and loose pin, described base has the working hole passed for line of cut; The top of loose pin for insert workpiece stock axis hole in and with axis hole tight fit, the bottom of loose pin for insert in described working hole and with working hole tight fit, described hold down gag is for being pressed on base plate by workpiece stock.

2. Linear cut frock clamp as claimed in claim 1, it is characterized in that: it also comprises fixed locating stud, fixed locating stud is fixed on base, and fixed locating stud is used for the positioning end of positioning workpieces stock.

3. Linear cut frock clamp as claimed in claim 1 or 2, it is characterized in that: it also comprises handle, handle is fixedly installed on the lower end of loose pin.