Wire cutting machine head inner cavity pressurizing device
By installing a solenoid valve and air pump system inside the online cutting head, high-pressure gas is used to remove impurities, solving the problems of component damage and wire threading difficulties caused by impurities entering the machine, thus achieving component protection and smooth processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI ZHUOAO TECH CO LTD
- Filing Date
- 2025-07-29
- Publication Date
- 2026-07-14
AI Technical Summary
Impurities entering the inner cavity of existing wire EDM heads cause corrosion of parts and poor wire threading, affecting service life and processing efficiency.
A solenoid valve is installed on the fixed base, and high-pressure gas is input through an air pump. The high-pressure gas is used to blow out impurities from the outer wall of the lifting wire guide, protecting the internal components and cleaning the inner cavity of the guide.
It effectively prevents impurities from entering the mold cavity, extends the life of parts, ensures smooth wire threading, and improves processing efficiency.
Smart Images
Figure CN224487899U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wire cutting equipment technology, and more specifically, to a pressure device for the inner cavity of a wire cutting head. Background Technology
[0002] In machining processes, especially in wire electrical discharge machining (EDM), it is often necessary to first establish the wire threading path for the electrode wire, such as molybdenum wire, copper wire, or galvanized wire, before proceeding with the cutting process. Existing methods for wire threading mainly involve using a threading mechanism above the workpiece to pass the electrode wire through a hole in the workpiece and then feeding it into a wire feeding mechanism. This wire threading structure often requires the workpiece and the wire feeding mechanism to be very close. We have made an improvement by setting a fixed seat on the wire feeding mechanism, with a lifting channel inside the fixed seat, and a simple structure of a lifting wire threading guide inside the lifting channel. By controlling only the internal lifting wire threading guide, docking with the workpiece or the wire threading mechanism can be achieved, thus establishing the wire threading path for the electrode wire.
[0003] However, we found that in the improved structure, when the lifting wire threading guide is raised and lowered, water, powder and other impurities on the outer wall of the lifting wire threading guide will enter the internal chamber of the lower head along with the outer wall of the lifting wire threading guide. Since there are many components such as bearings and gears installed in the chamber, the water, dust and other impurities that enter the chamber with the lifting wire threading guide will damage the above-mentioned components, such as rust and corrosion, which will greatly shorten the service life of the components. In addition, some impurities will also accumulate inside the lifting wire threading guide, affecting the smooth threading of the subsequent electrode wire.
[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content
[0005] This utility model provides a pressure device for the inner cavity of a wire cutting head, which aims to improve the problem of external water, dust and other impurities entering the cavity and the lifting wire threading guide along with the lifting wire threading guide, causing damage to the internal components of the cavity and affecting the smooth wire threading process.
[0006] To achieve the above objectives, this utility model provides a pressure device for the inner cavity of a wire EDM head, the specific technical solution of which is as follows:
[0007] A pressure device for the inner cavity of a wire EDM head includes: a fixed base, the fixed base having a cavity inside, the cavity being connected to a lifting channel, the lifting channel having a lifting wire threading guide inside, the lifting wire threading guide sliding along the lifting channel and the cavity; a sealing element being provided between the cavity and the fixed base, the lifting wire threading guide passing through the sealing element from inside the cavity and then extending to the outside of the fixed base; and a pressure mechanism including a solenoid valve, the outlet of the solenoid valve being connected to a vent, the vent being located inside the fixed base, and the end outlet of the vent being connected to the cavity.
[0008] In one embodiment, the seal is a sealing ring.
[0009] In one embodiment, the pressurizing mechanism is mounted on a fixed base.
[0010] In one embodiment, the inlet of the solenoid valve is connected to the air pump.
[0011] In one embodiment, an isolation cover is installed on the outside of the mounting base.
[0012] The beneficial effects of this embodiment are:
[0013] 1. By installing a solenoid valve on the fixed base, the inlet of the solenoid valve is connected to the air pump, and the outlet is connected to the internal cavity of the fixed base through the air passage. The air pump injects high-pressure gas into the air passage through the solenoid valve, and then the high-pressure gas enters the cavity of the fixed base along the air passage. As a result, the air pressure inside the cavity is relatively high, and the gas in the cavity flows outward along the gap between the outer wall of the lifting wire threading guide and the seal. As a result, water, dust and other impurities on the outer wall of the lifting wire threading guide are blown outward under the action of the high-pressure gas in the cavity, so they will not enter the cavity of the fixed base, thereby protecting the components inside the cavity and greatly improving the service life.
[0014] 2. The high-pressure gas inside the cavity of the fixed seat will also enter the inner cavity of the lifting wire guide from the bottom end of the lifting wire guide through the gap between the lifting channel and the lifting wire guide, and then be discharged from the top end of the lifting wire guide. The high-pressure gas will blow away the impurities in the inner cavity of the lifting wire guide, thereby cleaning the impurities in the inner cavity of the lifting wire guide, which facilitates the subsequent wire threading of the electrode wire and makes the wire threading smoother. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 The axial measurement of the lower head of the wire EDM machine provided in this embodiment of the utility model Figure 1 ;
[0017] Figure 2 The axial measurement of the lower head of the wire EDM machine provided in this embodiment of the utility model Figure 2 ;
[0018] Figure 3 A schematic diagram of the installation position of the solenoid valve provided for an embodiment of this utility model;
[0019] Figure 4 Schematic diagram of the internal structure of the cavity provided for the embodiment of this utility model Figure 1 ;
[0020] Figure 5 for Figure 4 Enlarged view of point A;
[0021] Figure 6 A schematic diagram of the ventilation duct outlet location provided for an embodiment of this utility model;
[0022] Figure 7 A schematic diagram of the pressurization mechanism provided for an embodiment of this utility model;
[0023] Figure 8 Schematic diagram of the internal structure of the cavity provided for the embodiment of this utility model Figure 2 .
[0024] Explanation of reference numerals in the attached figures:
[0025] 100. Fixed base; 110. Cavity; 120. Lifting channel; 130. Seal; 140. Isolation cover;
[0026] 200. Lifting and lowering wire-threading guide tube;
[0027] 300. Pressurization mechanism; 310. Solenoid valve; 320. Ventilation duct. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0029] The technical solutions provided by the embodiments of this utility model are described below with reference to the accompanying drawings.
[0030] Please see Figure 1-8 A pressure device for the inner cavity of a wire EDM head includes: a fixed base 100, an isolation cover 140 installed on the outside of the fixed base 100, the isolation cover 140 isolating the internal components of the fixed base 100 from the outside, preventing external impurities from entering the fixed base 100, and playing a role in isolation and protection; a cavity 110 is provided inside the fixed base 100, and many components such as bearings and gears are provided inside the cavity 110; a lifting channel 120 is connected to the bottom end of the cavity 110; a lifting wire threading guide 200 is provided inside the lifting channel 120; the lifting wire threading guide 200 slides upward along the lifting channel 120, then passes through the cavity 110, and finally passes through a sealing element 130 provided between the cavity 110 and the fixed base 100, and then extends to the outside of the fixed base 100; the sealing element 130 is a sealing ring used to seal the gap between the lifting wire threading guide 200 and the fixed base 100.
[0031] Because gaps inevitably occur between the seal 130 and the outer wall of the lifting wire threading guide 200 when the lifting wire threading guide 200 slides up and down, impurities such as water, cutting fluid, and powder adhering to the outer wall of the lifting wire threading guide 200 will enter the cavity 110 of the fixed seat 100 through the gap between the lifting wire threading guide 200 and the seal 130. After entering the cavity 110, these impurities will contaminate the internal components, causing them to rust, corrode, and suffer other damage, resulting in a significant reduction in their lifespan.
[0032] In view of the above problems, a pressurizing mechanism 300 is provided on the fixed base 100. The pressurizing mechanism 300 includes a solenoid valve 310, which is fixed on the outside of the fixed base 100. The outlet of the solenoid valve 310 is connected to a vent 320, which is opened inside the fixed base 100. The outlet of the vent 320 is connected to the cavity 110. The inlet of the solenoid valve 310 is connected to an air pump (not shown in the figure) through an air pipe. The air pump can input high-pressure gas into the cavity 110 through the vent 320. The solenoid valve 310 is used to control the connection and closure between the air pump and the vent 320.
[0033] Specifically, when the lifting wire threading guide 200 is raised or lowered, the solenoid valve 310 opens, thereby connecting the air pump and the ventilation channel 320. Then, the air pump injects high-pressure gas into the cavity 110 inside the fixed seat 100 through the ventilation channel 320. The high-pressure gas fills the entire cavity 110, resulting in a relatively high air pressure inside the cavity. Under the action of the air pressure, the gas inside the cavity 110 flows outward along the gap between the outer wall of the lifting wire threading guide 200 and the seal 130. As a result, water, powder and other impurities on the outer wall of the lifting wire threading guide 200 are blown outward under the action of the high-pressure gas inside the cavity 110, thus preventing them from entering the cavity 110 of the fixed seat 100. This protects the components inside the cavity 110 and greatly improves its service life.
[0034] In addition, the high-pressure gas inside the cavity 110 of the fixed seat 100 will also enter the inner cavity of the lifting wire threading conduit 200 from the bottom end of the lifting wire threading conduit 200 through the gap between the lifting channel 120 and the lifting wire threading conduit 200, and then be discharged from the top end of the lifting wire threading conduit 200. The high-pressure gas will blow away the impurities in the inner cavity of the lifting wire threading conduit 200, thereby cleaning the impurities in the inner cavity of the lifting wire threading conduit 200, which facilitates the subsequent threading of the electrode wire and makes the threading smoother.
[0035] It should be noted that the motion state and trajectory of each mechanism in this device can be automatically controlled by CNC program or PLC programming, and automatic start-stop and automatic operation can be achieved in conjunction with position switches. The above-mentioned programs and programming are common knowledge to those skilled in the art, so they will not be described in detail here.
[0036] The specific model and specifications of the solenoid valve 310 need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.
[0037] The power supply and operating principle of the solenoid valve 310 are clear to those skilled in the art and will not be described in detail here.
[0038] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A pressure device for the inner cavity of a wire EDM head, characterized in that, include: A fixing seat (100) is provided with a cavity (110) inside the fixing seat (100), and the cavity (110) is connected to a lifting channel (120), and a lifting wire guide (200) is provided inside the lifting channel (120). A sealing element (130) is provided between the cavity (110) and the fixed seat (100), and the lifting wire guide (200) passes through the sealing element (130) from inside the cavity (110) and then extends to the outside of the fixed seat (100); The pressurizing mechanism (300) includes a solenoid valve (310), the outlet of which is connected to a vent (320), the vent (320) being located inside the fixed seat (100), and the end outlet of the vent (320) being connected to the cavity (110).
2. The pressure device for the inner cavity of a wire EDM head according to claim 1, characterized in that, The sealing element (130) is a sealing ring.
3. The pressure device for the inner cavity of a wire EDM head according to claim 1, characterized in that, The pressurizing mechanism (300) is mounted on the fixed base (100).
4. The pressure device for the inner cavity of a wire EDM head according to claim 1, characterized in that, The inlet of the solenoid valve (310) is connected to the air pump.
5. The wire EDM head inner cavity pressurization device according to claim 1, characterized in that, An isolation cover (140) is installed on the outside of the fixing base (100).