1. Field of the Invention
The present invention relates to an auto-removing assembly, and more particularly to an auto-removing assembly for a wire electric discharge machine that can remove metal wires accurately.
2. Description of Related Art
With reference to
When the metal wire (E) is broken between the positioning heads (A, B), a conventional auto-removing assembly can be used to remove the metal wire (E) and comprises a guiding mount (I), a tension device (J), a pushing block (K), an electrode device (L) and a transporting tube (M). The guiding mount (I) is set between the wire outlet device (C) and the upper positioning head (A) and has a bottom, a jet channel (I1) and a suction channel (I2). The jet channel (I1) is longitudinally formed through the guiding mount (I) and communicates with an air source near the bottom of the guiding mount (I). The suction channel (I2) is conical, is formed in the guiding mount (I) and communicates with the jet channel (I1). The tension device (J) is set below the guiding mount (I) beside the metal wire (E) and has two rolling wheels (J1). The rolling wheels (J1) are contacted with each other to press and clamp the metal wire (E) and are rotated in the opposite direction. The pushing block (K) is movably set near the guiding mount (I). The electrode device (L) is contacted with the metal wire (E) beside the pushing block (K) to fuse the metal wire (E) and has a positive electrode and a negative electrode. The transporting pipe (M) is set above the guiding mount (I) and communicates with the jet channel (I1) to collect the fused metal wire (E) between the pushing block (K) and the upper positioning head (A).
In operation, when the metal wire (40) is broken between the positioning heads (A, B), the electrode device (L) will fuse the metal wire (E) near the positive electrode and the pushing block (K) will push the fused metal wire (E) moving into the suction channel (I2) of the guiding mount (I). When the fused metal wire (E) is pushed into the suction channel (I2), the air source that connected to the jet channel (I1) will provide a suction force to the fused metal wire (E). Then, the fused metal wire (E) can be removed to the transporting pipe (M). However, when the metal wire (E) is fused by the electrode device (L) near the pushing block (K), the tautly tension of metal wire (E) will disappear and the position of one end of the fused metal wire (E) near the positive electrode can not be controlled easily. Then, the fused metal wire (E) can not be accurately pushed into the suction channel (I2) of the guiding mount (I) by the pushing block (K). In addition, the suction force provided by the air source may not be strong enough to suck the fused metal wire (E) into the transporting pipe (M).
To overcome the shortcomings, the present invention tends to provide an auto-removing assembly for a wire electric discharge machine to mitigate the aforementioned problems.
The main objective of the present invention is to provide an auto-removing assembly for a wire electric discharge machine that can remove metal wires accurately.
The auto-removing assembly in accordance with the present invention is used for a wire electric discharge machine having an upper positioning head, a lower positioning head, a wire outlet device and a metal wire, and the auto-removing assembly has a blowing device, a suction device, a tension device, a fuse device, a transporting pipe and a detecting device. The blowing device is set near a front side of the metal wire and has a first guiding block and a first air source. The suction device is set near a rear side of the metal wire above the upper positioning head and has a second guiding block and a second air source. The tension device is set between the blowing device, the suction device and the upper positioning head and has a motor and two rolling wheels. The fuse device is set above the blowing device near a left side of the metal wire and has a pressure pump and a fused head. The transporting pipe is set above the suction device and aligns with the suction device to receive the fused metal wire.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The upper positioning head (10) and the lower positioning head (20) are respectively set on an upper side and a lower side of a metal work piece (Q). The wire outlet device (30) is set over the upper positioning head (10). The metal wire (40) is pulled out from the wire outlet device (30), passes through the positioning heads (A, B) to cut the metal work piece (Q) and has a front side, a rear side, a left side and a right side.
With reference to
The suction device (60) is set near the rear side of the metal wire (40) above the upper positioning head (10) and has a second guiding block (61) and a second air source (62). The second guiding block (61) may be made of metal, is set near the rear side of the metal wire (40) above the upper positioning head (10) and has a suction channel (611) and a jet channel (612). The suction channel (611) is obliquely formed through the second guiding block (61), aligns with the blow channel (511) of the first guiding block (51) and has a suction end and an outlet end. The suction end of the suction channel (611) faces the rear side of the metal wire (40) and aligns with the blow end of the blow channel (511) of the first guiding block (51). The jet channel (612) is formed in the second guiding block (61), communicates with the suction channel (611) and has a communicating end and a mounting end. The communicating end of the jet channel (612) communicates with the suction channel (611). The second air source (62) is screwed with the second guiding block (61) and communicates with the mounting end of the jet channel (612).
The tension device (70) is set between the blowing device (50), the suction device (60) and the upper positioning head (10) and has a driving cylinder (71), a motor (73) and two rolling wheels (75). The driving cylinder (71) is set near the right side of the metal wire (40) between the wire outlet device (30) and the upper positioning head (10) and has two clamping arms (711). The clamping arms (711) are respectively set on the front side and the rear side of the metal wire (40) and each clamping arm (711) is moved toward the metal wire (40) by the driving cylinder (71). In addition, the clamping arm (711) that set on the front side of the metal wire (40) is securely mounted on the first guiding block (51). Then, the first guiding block (51) can be moved toward the second guiding block by the corresponding clamping arm (711). The motor (73) is securely mounted on the clamping arm (711) that is mounted on the first guiding block (51) below the driving cylinder (71). The rolling wheels (75) may be made of metal, one of the rolling wheels (75) is rotatably connected to the motor (73) on the front side of the metal wire (40) and the other rolling wheel (75) is mounted on the clamping arm (711) that set on the rear side of the metal wire (40).
The fuse device (80) is set above the blowing device (50) near the left side of the metal wire (40) and has a pressure pump (81) and a fused head (82). The pressure pump (81) is set parallel to the metal work piece (Q) and has a free end toward the left side of the metal wire (40). The fused head (82) is mounted on the free end of the pressure pump (81) to fuse the metal wire (40) between the blowing device (50) and the suction device (60).
The transporting pipe (90) may be U-shaped, is set above the suction device (60) and has an inlet aligning with the of the outlet end of the suction channel (611) of the second guiding block (61) to receive the fused metal wire (40).
The detecting device (P) is an open circuit normally, is set near the tension device (70) and is electrically connected to the motor (73) of the tension device (70) and has a power supply (P1) and two electric cords (P2). One of the electric cords (P2) is electrically connected to the power supply (P1) and the rolling wheel (75) that mounted on the first guiding block (51) and the other electric cord (P2) is electrically connected to the power supply (P1) and the second guiding block (61). When the rolling wheels (75) clamp the metal wire (40) by the driving cylinder (71) and the fused metal wire (40) contacts the inner wall of the second guiding block (61), the detecting device (P) can be a closed circuit and this can be used to determine location of the fused metal wire (40).
With reference to
With further reference to
The auto-removing assembly as described for a wire electric discharge machine has the following advantages.
1. When the metal wire (40) is fused and cut by the fuse device (80), the end of fused metal wire (40) can be attracted into the suction channel (611) of the second guiding block (61) by the traction force without moving the fused metal wire (40) by the pushing block (K).
2. When the metal wire (40) is broken during cutting a metal work piece (Q) between the positioning heads (10, 20), the blowing device (50) and the suction device (60) will respectively provide a blown airflow and a suction airflow to form a sufficient traction force for the metal wire (40), and this can hold and control the fused metal wire (40) at a correct position in the suction channel (611) of the second guiding block (61).
3. The detecting device (P) can become a closed circuit or an open circuit to determine the broken and fused metal wire (40) in the suction channel (611) or not to let the rolling wheels (75) rotating relative to the clamping arms (711) to move the broken and fused metal wire (40).
4. In the present invention, the fused metal wire (40) will be moved by the rotation force of the rolling wheels (75) and the traction force of the blowing device (50) and the suction device (60) will make the broken and fused metal wire (40) accurately remove into a store box via the transporting pipe (90).
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.