Anti-collision lifting device for wire cutting machine and wire cutting machine

Abstract

The utility model discloses an anti-collision lifting device for a wire cutting machine and the wire cutting machine, and belongs to the field of wire cutting equipment. According to the anti-collision lifting device, a sliding block is installed on the wire cutting machine, a guide rail and a limiting piece are installed on the sliding block, a lead screw is matched with the limiting piece, an elastic piece is arranged between the bottom end of the lead screw and the limiting piece, a power source is installed on the guide rail, a nut is installed on the power source, the lead screw is matched with the nut, the guide rail is used for installing a machine head, and a sensor is used for detecting the moving position of the lead screw. After the machine head is connected with the to-be-machined part of the workpiece, when the anti-collision lifting device continues to apply acting force for moving towards the direction close to the workpiece to the machine head, the power source drives the nut to rotate towards the first direction, and the lead screw is made to move towards the direction away from the workpiece. After the machine head is detected to be connected with the to-be-machined part of the workpiece through cooperation of a mechanical structure, the situation that the machine head continues to be lowered to cause the collision machine to damage the mechanical structure is avoided, the misjudgment rate of connection of the machine head and the workpiece is reduced, and the problem that an electric induction type anti-collision device is high in misjudgment rate is solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of wire cutting equipment, specifically an anti-collision lifting device for a wire cutting machine and a wire cutting machine. Background Technology

[0002] In the prior art, the head of the wire cutting machine is installed on the lifting device, and an inductive anti-collision device is set on the head. When the head comes into contact with the workpiece, the circuit of the inductive anti-collision device is activated to determine the head and the workpiece, and then the lifting device stops moving downward.

[0003] However, in actual wire EDM work, coolant is needed for cooling and to flush out waste from the machining area. Sometimes, liquid may be present between the die head and the workpiece during the next wire threading process. This causes the circuit of the inductive anti-collision device to be connected through the die head, liquid, and workpiece before the die head contacts the workpiece, resulting in a high false alarm rate for the inductive anti-collision device. Utility Model Content

[0004] Purpose of the utility model: To provide an anti-collision lifting device for wire cutting machines and a wire cutting machine, which, by changing the structure of the lifting device and coordinating it with the physical structure of the sensor, detects the contact between the machine head and the part to be processed on the workpiece, thereby reducing the false judgment rate of the contact between the machine head and the workpiece and solving the problem of high false judgment rate of inductive anti-collision devices.

[0005] The technical solution of this utility model is as follows: Firstly, an anti-collision lifting device for a wire cutting machine is installed on the wire cutting machine.

[0006] The anti-collision lifting device includes: slider, guide rail, limit component, sensor, lead screw, elastic component, power source and nut.

[0007] The slider is mounted on the wire EDM machine, the guide rail and the limiting component are mounted on the slider, the lead screw cooperates with the limiting component, the elastic component is disposed between the bottom end of the lead screw and the limiting component, the power source is mounted on the guide rail, the nut is mounted on the power source, the lead screw and the nut cooperate, the guide rail is used to mount the machine head, the sensor is used to detect the movement position of the lead screw, and the sensor is used to connect to the control equipment of the wire EDM machine.

[0008] The limiting component is used to limit the circumferential rotation of the lead screw.

[0009] When the machine head comes into contact with the part of the workpiece to be processed, the anti-collision lifting device applies a force to the machine head to move it closer to the workpiece. The power source drives the nut to rotate in the first direction, so that the lead screw overcomes the force of the elastic element and moves away from the workpiece. When the sensor detects that the lead screw has moved to the predetermined position, the sensor sends an electrical signal to the control device that the machine head is in contact with the part of the workpiece to be processed.

[0010] In a further embodiment of the first aspect, the part where the lead screw cooperates with the limiting member is a column structure with a side plane.

[0011] The limiting member engages with the side plane of the lead screw, thereby limiting the circumferential rotation of the lead screw.

[0012] In a further embodiment of the first aspect, the lead screw is inserted into the limiting member.

[0013] In a further embodiment of the first aspect, the lead screw is provided with a stepped portion, which engages with the end of the limiting member away from the elastic member. When the machine head is not in contact with the workpiece, the stepped portion engages with the end of the limiting member away from the elastic member, thereby limiting the axial movement of the lead screw by the limiting member.

[0014] In a further embodiment of the first aspect, the anti-collision lifting device further includes: a sensing element, the sensing element being installed at the bottom end of the lead screw, the sensing element being disposed below the limiting element, the elastic element being disposed between the limiting element and the sensing element, and the sensor position cooperating with the sensing element position.

[0015] When the lead screw drives the sensing element to move away from the workpiece, and the sensor detects that the lead screw has moved to a predetermined position, the sensor sends an electrical signal to the control device indicating that the machine head is connected to the part of the workpiece to be processed. This allows the sensing element to be reused as a limiting structure of an elastic element, thereby simplifying the structure.

[0016] In a further embodiment of the first aspect, the anti-collision lifting device further includes: an extension member installed at one end of the limiting member near the machine head, and the elastic member disposed between the extension member and the sensing member, wherein the length of the extension member can be adjusted as needed to adjust the mating position of the sensing member and the sensor, and the length of the elastic member can also be adjusted.

[0017] In a further embodiment of the first aspect, the anti-collision lifting device further includes: a bolt installed at one end of the lead screw near the machine head, the sensing element being installed on the lead screw by the bolt, and the elastic element being a spring.

[0018] In a further embodiment of the first aspect, the spring is sleeved on the bolt.

[0019] In a further embodiment of the first aspect, the power source includes: a motor and a gear set, the gear set being mounted on the motor, and the nut being mounted on the gear set.

[0020] Secondly, the wire cutting machine includes: frame, control equipment, head, and anti-collision lifting device.

[0021] The slider of the anti-collision lifting device is mounted on the frame, the machine head is mounted on the guide rail of the anti-collision lifting device, and the power source and sensors of the anti-collision lifting device are electrically connected to the control equipment.

[0022] The beneficial effects of this utility model are as follows: By cooperating with limiting components, sensors, lead screws, sensing components, and elastic components, this application can prevent the guide rail and the head from moving further after the machine head contacts the part to be processed on the workpiece. This allows the lead screw to overcome the force exerted by the elastic components on the limiting components and the lead screw, causing the lead screw to move away from the workpiece. Consequently, the control equipment of the wire EDM machine can determine whether the machine head is in contact with the part to be processed on the workpiece by detecting the position of the lead screw through the sensor. By cooperating with the mechanical structure to detect that the machine head is in contact with the part to be processed on the workpiece, it avoids further lowering of the machine head, which could cause a collision and damage to the mechanical structure. This reduces the false judgment rate of detecting the contact between the machine head and the workpiece, solves the problem of high false judgment rate of inductive anti-collision devices, and thus improves the wire threading success rate of the wire EDM machine. Attached Figure Description

[0023] Figure 1 This is an isometric schematic diagram of the lifting device of this utility model.

[0024] Figure 2 This is a partially enlarged isometric schematic diagram of the lifting device of this utility model.

[0025] Figure 3 This is a partially enlarged cross-sectional view of the lifting device of this utility model.

[0026] Figure 4 This is an isometric schematic diagram of a wire EDM machine using this invention.

[0027] The attached figures are labeled as follows: slider 1, guide rail 2, limit component 3, extension component 31, sensor 4, lead screw 5, sensing component 6, elastic component 7, power source 8, motor 81, gear set 82, nut 9, bolt 10, machine head 11, workpiece 12, and frame 13. Detailed Implementation

[0028] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0029] This application discloses an anti-collision lifting device for a wire cutting machine and a wire cutting machine. By changing the structure of the lifting device and coordinating it with the physical structure of the sensor, it can detect the contact between the machine head and the part to be processed on the workpiece, thereby reducing the false judgment rate of the contact between the machine head and the workpiece and solving the problem of high false judgment rate of inductive anti-collision devices.

[0030] Firstly, the anti-collision lifting device includes: slider 1, guide rail 2, limit component 3, sensor 4, lead screw 5, elastic component 7, power source 8, and nut 9.

[0031] The slider 1 is installed on the wire EDM machine. The guide rail 2 and the limiting member 3 are installed on the slider 1. The lead screw 5 cooperates with the limiting member 3. The elastic member 7 is set between the bottom end of the lead screw 5 and the limiting member 3. The power source 8 is installed on the guide rail 2. The nut 9 is installed on the power source 8. The lead screw 5 and the nut 9 cooperate. The guide rail 2 is used to install the machine head 11. The sensor 4 is used to detect the movement position of the lead screw 5. The sensor 4 is used to connect to the control equipment of the wire EDM machine. The sensor 4 can be installed on the slider or the frame of the wire EDM machine. The sensor 4 can be a photoelectric sensor or a proximity switch or other position sensor. Its installation position can cooperate with the bottom end or top end of the lead screw 5. The movement position of the lead screw 5 can be detected directly or indirectly.

[0032] The limiting component 3 is used to limit the circumferential rotation of the lead screw 5.

[0033] When the machine head 11 comes into contact with the part of the workpiece 12 to be processed, the anti-collision lifting device applies a force to the machine head 11 to move it closer to the workpiece 12. The power source 8 drives the nut 9 to rotate in the first direction, causing the lead screw 5 to overcome the force of the elastic element 7 and move away from the workpiece 12. When the sensor 4 detects that the lead screw 5 has moved to the predetermined position, the sensor 4 sends an electrical signal to the control device that the machine head 11 is in contact with the part of the workpiece 12 to be processed. The elastic element 7 applies a force to the lead screw 5 toward the workpiece, and this force is greater than the resistance of the guide rail 2 when it moves along the slider 1. When the power source 8 drives the nut 9 to rotate in the first direction, the guide rail 2 moves along the slider 1 first.

[0034] like Figure 2 and 3 The part where the lead screw 5 and the limiting member 3 cooperate is a column structure with a side plane.

[0035] The limiting member 3 engages with the side plane of the lead screw 5, so that the limiting member 3 is used to limit the circumferential rotation of the lead screw 5.

[0036] The lead screw 5 is inserted into the limiting member 3.

[0037] The lead screw 5 is provided with a stepped part, which is engaged with the end of the limiting member 3 away from the elastic member 7. When the machine head 11 is not in contact with the workpiece 12, the stepped part is in contact with the end of the limiting member 3 away from the elastic member 7, so that the limiting member 3 limits the axial movement of the lead screw 5.

[0038] like Figure 2The lead screw 5 shown has two symmetrically arranged side planes. The limiting member 3 cooperates with the two side planes to limit the circumferential rotation of the lead screw 5 while preventing the lead screw 5 from deviating. The length of the side plane is greater than the length of the limiting member 3 and its cooperation, so that the lead screw 5 has a margin for vertical movement.

[0039] like Figure 1 The power source 8 shown includes a motor 81 and a gear set 82. The motor 81 is mounted on the guide rail 2, the gear set 82 is mounted on the motor 81, and the nut 9 is mounted on the gear set 82. During operation, the motor 81 drives the gear set 82 to rotate, and the gear set 82 drives the nut 9 to rotate.

[0040] Further embodiments regarding the cooperation between sensor 4 and lead screw 5, such as... Figure 1-3 The anti-collision lifting device shown also includes: a sensor 6, which is installed at the bottom of the lead screw 5 and located below the limiting member 3; an elastic member 7 is located between the limiting member 3 and the sensor 6; and the sensor 4 is positioned to match the position of the sensor 6. In this embodiment, the sensor 4 is installed on the slider.

[0041] When the lead screw 5 drives the sensing element 6 to move away from the workpiece 12, and the sensor 4 detects that the lead screw 5 has moved to the predetermined position, the sensor 4 sends an electrical signal to the control device indicating that the machine head is connected to the part of the workpiece 12 to be processed.

[0042] like Figure 2 and 3 The anti-collision lifting device shown also includes: an extension 31, which is installed at one end of the limiting member 3 near the head 11, and an elastic member 7 is disposed between the extension 31 and the sensing member 6.

[0043] like Figure 3 The anti-collision lifting device shown also includes: a bolt 10, which is installed on the end of the lead screw 5 near the machine head 11; a sensing element 6 is installed on the lead screw 5 through the bolt 10; and an elastic element 7 is a spring, wherein the spring is sleeved on the bolt 10.

[0044] Secondly, the wire cutting machine includes: a frame 13, control equipment, a head 11, and an anti-collision lifting device as described in the first aspect.

[0045] The slider 1 of the anti-collision lifting device is installed on the frame 13, the head 11 is installed on the guide rail 2 of the anti-collision lifting device, and the power source 8 and sensor 4 of the anti-collision lifting device are electrically connected to the control equipment.

[0046] Working method: When the machine head 11 is not in contact with the part to be processed of the workpiece 12, the anti-collision lifting device drives the machine head 11 to move closer to the workpiece 12. The power source 8 drives the nut 9 to rotate in the first direction. At this time, the resistance of the guide rail 2 moving downward is less than the force exerted by the elastic element 7 on the limiting element 3 and the sensing element 6, so that the guide rail 2 drives the power source 8, the nut 9 and the machine head 11 to move closer to the workpiece 12.

[0047] When the machine head 11 comes into contact with the part of the workpiece 12 to be processed, the anti-collision lifting device applies a force to the machine head 11 to move closer to the workpiece 12. The power source 8 drives the nut 9 to rotate in the first direction. At this time, the resistance of the guide rail 2 moving downward is greater than the force applied by the elastic element 7 to the limiting element 3 and the sensing element 6. This causes the lead screw to drive the sensing element 6 to overcome the force applied by the elastic element 7 to the limiting element 3 and the sensing element 6. This causes the lead screw 5 to drive the sensing element 6 to move away from the workpiece 12. When the sensor 4 detects that the sensing element 6 has moved to the predetermined position, the sensor 4 sends an electrical signal to the control equipment indicating that the machine head 11 is in contact with the part of the workpiece 12 to be processed. Through the cooperation of the mechanical structure of the sensor 4 to detect the position of the sensing element 6, the machine head 11 is detected to be in contact with the part of the workpiece 12 to be processed. This determines that the machine head 11 is in contact with the part of the workpiece 12 to be processed, reducing the false judgment rate of the machine head 11 being in contact with the workpiece 12.

[0048] When the anti-collision lifting device drives the machine head 11 to move away from the workpiece 12, the power source 8 drives the nut 9 to rotate in the second direction, so that the lead screw drives the sensing element 6 to reset and move to the initial position in the direction closer to the workpiece 12. Then, the guide rail 2 drives the power source 8, the nut 9 and the machine head 11 to move away from the workpiece 12.

[0049] One of the first-direction rotation and the second-direction rotation is a clockwise rotation from a top-down perspective, and the other is a counter-clockwise rotation.

[0050] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. An anti-collision lifting device for wire EDM machines, which is installed on the wire EDM machine; Its features are, The anti-collision lifting device includes: slider, guide rail, limit component, sensor, lead screw, elastic component, power source and nut; The slider is mounted on the wire EDM machine, the guide rail and the limiting component are mounted on the slider, the lead screw cooperates with the limiting component, the elastic component is disposed between the bottom end of the lead screw and the limiting component, the power source is mounted on the guide rail, the nut is mounted on the power source, the lead screw and the nut cooperate, the guide rail is used to mount the machine head, the sensor is used to detect the movement position of the lead screw, and the sensor is used to connect to the control equipment of the wire EDM machine; The limiting component is used to limit the circumferential rotation of the lead screw; When the machine head comes into contact with the part of the workpiece to be processed, the anti-collision lifting device applies a force to the machine head to move it closer to the workpiece. The power source drives the nut to rotate in the first direction, so that the lead screw overcomes the force of the elastic element and moves away from the workpiece. When the sensor detects that the lead screw has moved to the predetermined position, the sensor sends an electrical signal to the control device that the machine head is in contact with the part of the workpiece to be processed.

2. The anti-collision lifting device for a wire cutting machine according to claim 1, characterized in that, The part where the lead screw mates with the limiting component is a cylindrical structure with a side plane; The limiting member engages with the side plane of the lead screw, thereby limiting the circumferential rotation of the lead screw.

3. The anti-collision lifting device for a wire cutting machine according to claim 2, characterized in that, The lead screw is inserted into the limiting member.

4. The anti-collision lifting device for a wire cutting machine according to claim 1, characterized in that, The lead screw has a stepped portion, which engages with the end of the limiting member away from the elastic element. When the machine head is not in contact with the workpiece, the stepped portion engages with the end of the limiting member away from the elastic element, thereby limiting the axial movement of the lead screw.

5. The anti-collision lifting device for a wire cutting machine according to claim 1, characterized in that, Also includes: The sensor is installed at the bottom end of the lead screw and is located below the limiting member. The elastic member is located between the limiting member and the sensor, and the position of the sensor is matched with the position of the sensor. When the lead screw drives the sensing element to move away from the workpiece, and the sensor detects that the lead screw has moved to a predetermined position, the sensor sends an electrical signal to the control device indicating that the machine head is connected to the part of the workpiece to be processed.

6. The anti-collision lifting device for a wire cutting machine according to claim 5, characterized in that, Also includes: An extension member is installed at the end of the limiting member near the machine head, and the elastic member is disposed between the extension member and the sensing member.

7. The anti-collision lifting device for a wire cutting machine according to claim 5, characterized in that, Also includes: A bolt is installed at one end of the lead screw near the machine head. The sensing element is installed on the lead screw by the bolt, and the elastic element is a spring.

8. The anti-collision lifting device for a wire cutting machine according to claim 7, characterized in that, The spring is fitted onto the bolt.

9. The anti-collision lifting device for a wire cutting machine according to claim 1, characterized in that, The power source includes a motor and a gear set, wherein the gear set is mounted on the motor and the nut is mounted on the gear set.

10. A wire cutting machine, characterized in that, include: The frame, control equipment, machine head, and the anti-collision lifting device as described in any one of claims 1-9; The slider of the anti-collision lifting device is mounted on the frame, the machine head is mounted on the guide rail of the anti-collision lifting device, and the power source and sensors of the anti-collision lifting device are electrically connected to the control equipment.

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