An automatic threading and wire cutting upper guide wire rod positioning device

Abstract

The utility model discloses an automatic silk thread cutting's upper guide wire rod positioning device belongs to wire cutting equipment field. This upper guide wire rod positioning device includes: upper guide wire rod, sleeve and sensor, and upper guide wire rod is installed in upper machine head, and sleeve is sleeved in upper guide wire rod and can go up and down, and sensor is arranged in the cooperation position with sleeve, when upper guide wire rod end and workpiece interval reach the preset distance, sleeve and workpiece meet and make sensor be triggered. The utility model discloses through the sleeve of going up and down and workpiece meeting and detecting the position of upper guide wire rod and workpiece, has solved the rigid impact of the slope part of the workpiece of the prior art upper guide wire rod directly, and the problem of the easy appearance upper guide wire rod bottom eye mould deviation influence silk thread accuracy.

Description

Technical Field

[0001] This utility model belongs to the technical field of wire cutting equipment, specifically an upper guide rod positioning device for automatic wire cutting. Background Technology

[0002] Automatic wire threading technology in wire EDM machines is a crucial aspect of modern precision machining. Its core objective is to achieve efficient and precise wire threading through automation, thereby improving processing efficiency and equipment reliability. In existing technologies, automatic wire threading typically relies on the upper guide rod, equipped with an eyepiece, contacting the workpiece to detect their position. When the system initiates the automatic threading program, the upper head moves downwards until the bottom of the upper guide rod contacts the workpiece surface. At this point, a feedback mechanism detects the contact signal, and the system immediately stops the downward movement of the upper head and begins the wire threading action. While this design achieves a degree of automation, when the upper guide rod contacts the sloping part of the workpiece, the eyepiece at the bottom of the upper guide rod may shift, affecting the accuracy of wire threading. Utility Model Content

[0003] The purpose of this utility model is to provide an upper guide rod positioning device for automatic wire cutting. It detects the position of the upper guide rod and the workpiece by connecting the upper guide rod to the workpiece through a liftable sleeve. This solves the problem in the prior art where the guide rod directly impacts the inclined part of the workpiece with rigidity, which easily leads to the displacement of the bottom eye mold of the upper guide rod, affecting the accuracy of wire cutting.

[0004] The technical solution of this utility model is as follows: an automatic wire cutting upper guide rod positioning device includes: an upper guide rod, a sleeve, and a sensor.

[0005] The upper guide rod is installed on the upper machine head, the sleeve is elliptical and sleeved on the upper guide rod, and the sensor is set at the position that mates with the sleeve.

[0006] When the distance between the end of the upper guide rod and the workpiece reaches a preset distance, the sleeve connects with the workpiece, triggering the sensor.

[0007] In a further embodiment, the positioning device further includes a spring disposed above the sleeve, the spring being used to apply a downward moving force to the sleeve, thereby enabling the sleeve to quickly return to its original position when it separates from the workpiece.

[0008] In a further embodiment, the sleeve is provided with a sensing part that extends to a position where it engages with a sensor.

[0009] When the distance between the end of the upper guide rod and the workpiece reaches a preset distance, the sleeve drives the sensing part to move to the position where the sensor is triggered.

[0010] In a further embodiment, the positioning device further includes a limiting seat, which is mounted on the upper machine head or the upper guide rod.

[0011] The limiting seat has an elongated hole, through which the sensing part extends to a position where it engages with the sensor. The elongated hole is used to circumferentially limit the sensing part.

[0012] In a further embodiment, the sleeve is provided with a wire-blocking channel below the upper wire guide rod. The wire-blocking channel can reduce the open gap between the upper wire guide rod and the workpiece when the upper surface of the wire threading part of the workpiece is a sloping structure, thereby confining the electrode wire within the wire-blocking channel and improving the wire threading success rate.

[0013] In a further embodiment, the sensor is a position sensor.

[0014] In a further embodiment, the sensor is mounted on the frame, lifting device, upper head, or upper guide rod of the wire cutting machine.

[0015] In a further embodiment, the sensor is mounted on the sleeve, and is triggered when the distance between the sensor and the upper head or upper guide rod reaches a preset distance.

[0016] In a further embodiment, the sleeve is a cylindrical tube or a prismatic tube.

[0017] In a further embodiment, the upper guide rod is provided with an electrode wire channel through which the electrode wire can pass.

[0018] One or both ends of the electrode wire channel are provided with guide wire eye molds.

[0019] The beneficial effects of this utility model are as follows: This application uses a sleeve fitted onto the upper guide rod to connect the liftable sleeve to the workpiece. By utilizing the cooperation of the sensor and the sleeve, the position of the upper guide rod and the workpiece can be detected even when the upper guide rod is not connected to the workpiece. During the detection process, the sleeve can be raised under force, reducing the probability of the bottom eye mold of the upper guide rod deviating and ensuring the accuracy of wire threading. This solves the problem in the prior art where the guide rod directly impacts the sloping part of the workpiece with rigidity, which easily leads to the deviation of the bottom eye mold of the upper guide rod, affecting the accuracy of wire threading. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an embodiment of the upper guide screw positioning device of this utility model installed on the upper machine head.

[0021] Figure 2 This is an isometric schematic diagram of an embodiment of the present invention in which the sleeve is fitted onto the upper guide rod.

[0022] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention in which the sleeve is fitted onto the upper guide rod.

[0023] Figure 4 This is a utility model Figure 3 Enlarged diagram of point A.

[0024] The attached figures are labeled as follows: sleeve 1, sensing part 11, wire guide channel 12, sensor 2, upper head 3, limit seat 4, upper guide rod 5, electrode wire channel 51, guide eye mold 52, spring 6. Detailed Implementation

[0025] 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.

[0026] This application discloses an upper guide rod positioning device for automatic wire cutting. The sensor of the positioning device is connected to the control device of the wire cutting machine, so that when the sensor is triggered, it can send an electrical signal to the control device of the wire cutting machine. The upper guide rod positioning device detects the position of the upper guide rod and the workpiece by connecting with the workpiece through a liftable sleeve. This solves the problem in the prior art where the guide rod directly impacts the inclined part of the workpiece with rigidity, which easily causes the bottom eye of the upper guide rod to deviate, affecting the accuracy of wire cutting.

[0027] like Figure 1-4 The upper guide rod positioning device shown includes: upper guide rod 5, sleeve 1 and sensor 2.

[0028] The upper guide rod 5 is installed on the upper head 3, the sleeve 1 is lifted and sleeved on the upper guide rod 5, and the sensor 2 is set at the position that cooperates with the sleeve 1. The sleeve 1 can be any shape of tube, such as a cylindrical tube or a prismatic tube, and the sensor 2 is a position sensor 2.

[0029] When the distance between the end of the upper guide rod 5 and the workpiece reaches the preset distance, the sleeve 1 connects with the workpiece, triggering the sensor 2.

[0030] like Figure 3 The upper guide rod positioning device shown also includes a spring 6, which is located above the sleeve 1. The spring 6 is used to apply a downward force to the sleeve 1. The bottom end of the spring 6 is connected to the sleeve 1, and its top end can be connected to the upper machine head 3. Alternatively, the upper guide rod 5 can be equipped with a baffle so that the top end of the spring 6 is connected to the baffle of the upper guide rod 5.

[0031] like Figure 1-3 The sleeve 1 shown is provided with a sensing part 11, which extends to a position where it engages with the sensor 2.

[0032] When the distance between the end of the upper guide rod 5 and the workpiece reaches the preset distance, the sleeve 1 drives the sensing part 11 to move to the position where the sensor 2 is triggered. The circumferential limit of the sensing part 11 can be achieved by the sleeve 1 and the polygonal structure of the upper guide rod 5 to achieve the circumferential limit of the sleeve 1, thereby achieving the circumferential limit of the sensing part 11.

[0033] like Figure 1 and 3 The upper guide rod positioning device shown also includes: a limiting seat 4, which is installed on the upper machine head 3 or the upper guide rod 5.

[0034] The limiting seat 4 is provided with an elongated hole, through which the sensing part 11 extends to the position where it mates with the sensor 2. The elongated hole is used to circumferentially limit the sensing part 11.

[0035] like Figure 4 The sleeve 1 shown has a wire-blocking channel 12 surrounding the upper guide rod 5.

[0036] Sensor 2 can be installed on the frame, lifting device, upper head 3, or upper guide rod 5 of the wire cutting machine, such as... Figure 1 The sensor 2 shown is installed on the upper head 3.

[0037] like Figure 4 The upper guide rod 5 shown is provided with an electrode wire channel 51 through which the electrode wire can pass.

[0038] One or both ends of the electrode wire channel 51 are provided with guide wire eyelets 52, such as Figure 4 As shown, a guide wire eye mold 52 is provided at the bottom end of the electrode wire channel 51.

[0039] In another embodiment, sensor 2 is installed on sleeve 1. Sensor 2 is triggered when the distance between sensor 2 and upper head 3 or upper guide rod 5 reaches a preset distance. Sensor 2 can detect the distance between itself and the lower surface of upper head 3, or upper head 3 or upper guide rod 5 can be provided with a sensing part to cooperate with sensor 2. The preset distance between the end of upper guide rod 5 and the workpiece and the preset distance between sensor 2 and upper head 3 or upper guide rod 5 can be the same or different.

[0040] Instructions for use: The lifting device of the wire EDM machine moves the upper guide rod 5 and the sleeve 1 closer to the workpiece via the upper head 3.

[0041] When the upper head 3 moves the sleeve 1 to the position where it contacts the workpiece, the upper head 3 continues to move the upper guide rod 5 so that the distance between the end of the upper guide rod 5 and the workpiece reaches the preset distance. During this process, the sleeve 1 contacts the workpiece, and the sleeve 1 compresses the spring 6, causing the sensing part 11 to move to the position where the sensor 2 is triggered. At this time, the sensor 2 is triggered to send an electrical signal to the control device of the wire cutting machine, so that the upper head 3 stops moving downward and then the wire cutting machine performs the wire threading operation, wherein the electrode wire can be molybdenum wire or copper wire.

[0042] After the wire threading is completed, the lifting device of the wire EDM machine drives the upper guide rod 5 and the sleeve 1 to move away from the workpiece through the upper head 3. At this time, the spring 6 applies a downward force to the sleeve 1, causing the sleeve 1 to move downward to the initial position.

[0043] 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. A positioning device for an upper guide rod in an automatic wire cutting process, characterized in that, include: Upper guide rod, sleeve, and sensor; The upper guide rod is installed on the upper machine head, the sleeve is elliptical and sleeved on the upper guide rod, and the sensor is set at the position that mates with the sleeve; When the distance between the end of the upper guide rod and the workpiece reaches a preset distance, the sleeve connects with the workpiece, triggering the sensor.

2. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, Also includes: A spring is disposed above the sleeve, and the spring is used to apply a downward force to the sleeve.

3. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, The sleeve is provided with a sensing part, which extends to a position where it engages with a sensor. When the distance between the end of the upper guide rod and the workpiece reaches a preset distance, the sleeve drives the sensing part to move to the position where the sensor is triggered.

4. The upper guide rod positioning device for automatic wire cutting according to claim 3, characterized in that, Also includes: A limiting seat, which is installed on the upper machine head or the upper guide rod; The limiting seat has an elongated hole, through which the sensing part extends to a position where it engages with the sensor. The elongated hole is used to circumferentially limit the sensing part.

5. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, The sleeve has a wire-blocking channel below the upper guide rod.

6. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, The sensor is a position sensor.

7. The upper guide rod positioning device for automatic wire cutting according to claim 1 or 3, characterized in that, The sensor is installed on the frame, lifting device, upper head, or upper guide rod of the wire cutting machine.

8. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, The sensor is installed on the sleeve, and is triggered when the distance between the sensor and the upper head or upper guide rod reaches a preset distance.

9. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, The sleeve is a cylindrical tube or a prismatic tube.

10. The upper guide rod positioning device for automatic wire cutting according to claim 1, characterized in that, The upper guide rod is provided with an electrode wire channel through which the electrode wire can pass; One or both ends of the electrode wire channel are provided with guide wire eye molds.

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