Multifunctional milling head mounting device for electrolytic electric spark milling

Abstract

The utility model relates to the technical field of electrolytic electric spark combined machining, in particular to a multifunctional milling head mounting device for electrolytic electric spark milling. The installation device comprises an automatic liquid discharging assembly arranged in the cooling blind hole. The automatic liquid discharging assembly comprises an elastic piece and a partition plate. One end of the elastic piece is connected with the inner wall of the cooling blind hole, and the other end is connected with the partition plate; the partition plate divides the cooling blind hole into a cooling hole and a movable hole; the conductive shaft is provided with a liquid outflow channel which can be communicated with the outside; the elastic piece can be extruded to the liquid outflow channel to be communicated with the cooling hole. The mounting device not only can provide a liquid supply connecting device for the internal liquid spraying milling head, but also can solve the problem that cutting liquid absorbing heat generated by contact friction conduction of a conductive shaft and an electric brush in a cooling blind hole is difficult to discharge and replace, and the cutting liquid in the cooling blind hole can be replaced and discharged only by the gravity of the cutting liquid; the automation degree is high; the operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic electric spark composite machining technical field, specifically, relate to a kind of multifunctional milling head mounting device for electrolytic electric spark milling. BACKGROUND

[0002] At present, for the overall component of difficult cutting materials such as titanium alloy and high-temperature alloy, the commonly used manufacturing process includes numerical control milling, electric spark machining and electrolytic machining. When electric spark machining is used, not only the machining efficiency is still limited, but also recast layer, heat affected zone and micro-cracks are easily formed on the workpiece surface, which will affect the fatigue strength and service life of the overall component. Although electrolytic machining has the advantages of no tool cathode loss, high machining efficiency and no stress, but during the anode dissolution process, a high-resistance and dense passivation film is easily formed on the workpiece surface, which will hinder the electrolytic reaction. Especially when titanium alloy and other materials with strong self-passivation are machined by electrolytic machining, active cutting fluid containing chloride ions is usually selected to destroy the passivation film, which results in serious stray corrosion and low machining precision.

[0003] Electrolytic electric spark composite machining technology (ECDM) integrates the advantages of electrolysis and electric spark machining, and is a new special machining technology. It realizes efficient machining of difficult-to-machine materials by using a composite machining method of alternating electrochemical machining and electric spark discharge machining. It can achieve high-efficiency etching machining for materials that are difficult to machine by ordinary cutting machining methods, so it is gradually used in the machining of difficult-to-machine materials. In the field of aerospace, this technology is used in the machining of large titanium alloy, nickel-based alloy and other high-temperature alloy materials, which has the effect of low cost and high efficiency.

[0004] When building an ECDM milling equipment platform, the electrode material as the milling head needs to be installed on the numerical control milling machine and other basic machining platforms to realize the hardware construction of the ECDM milling equipment platform. How to realize the quick installation and removal of the electrode material as the milling head and the basic machining platform, and the quick replacement of the electrode milling head and the ordinary milling head is the basis for stable and efficient operation of the ECDM milling equipment, and is a basic problem that needs to be solved when building the ECDM milling equipment platform.

[0005] The Chinese patent with patent number CN201920806074.2 of our company provides a multifunctional milling head mounting device for electrolytic electric spark milling, which can well solve the problems of quick docking and installation of the electrode milling head and the basic machining platform, and the quick replacement of the electrode milling head and the ordinary milling head. It also provides a liquid supply connection device for the internal liquid jet milling head, which is versatile, easy to use and has strong universality.

[0006] However, the above patent still has the problems that the cutting fluid absorbed in the cooling blind hole to absorb the heat generated by the contact friction between the conductive shaft and the brush is difficult to discharge and replace, and the conductive shaft is heavy and is not conducive to installation. Content of the utility model

[0007] The utility model discloses a multifunctional milling head mounting device for electrolytic electric spark milling, which can not only provide a liquid supply connecting device for the internal liquid spraying milling head, but also solve the problem that the cutting fluid absorbed in the cooling blind hole to absorb the heat generated by the contact friction between the conductive shaft and the brush is difficult to discharge and replace.

[0008] In order to achieve the above-mentioned purpose, the preferred solution adopted by the utility model is as follows:

[0009] A multifunctional milling head mounting device for electrolytic electric spark milling, comprising a conductive shaft, one end of the conductive shaft is detachably connected with a basic machining platform, and the other end is provided with a clamping sleeve for fixing a milling head; an installation sleeve and a brush holder are sequentially sleeved on the conductive shaft from the end close to the clamping sleeve to the end close to the basic machining platform; the conductive shaft is rotatably connected with the installation sleeve and the brush holder; the installation sleeve is provided with an internal liquid spraying device; the conductive shaft is provided with an internal liquid spraying channel connected with the internal liquid spraying device and in communication with the internal liquid spraying device, and a cooling blind hole coaxially arranged with the internal liquid spraying channel; the cooling blind hole is arranged between the installation sleeve and the basic machining platform; and the device further comprises an automatic liquid discharging assembly arranged in the cooling blind hole; the automatic liquid discharging assembly comprises an elastic member and a partition plate; the extension direction of the elastic member is perpendicular to the axis of the cooling blind hole; one end of the elastic member is connected with the inner wall of the cooling blind hole, and the other end is connected with the partition plate; the partition plate divides the cooling blind hole into a cooling hole and a movable hole; the conductive shaft is provided with a liquid outflow channel in communication with the outside; when the elastic member is not extruded, the liquid outflow channel is in communication with the movable hole; and the elastic member can be extruded to make the liquid outflow channel in communication with the cooling hole.

[0010] Further, in the preferred embodiment of the utility model, the clamping sleeve is provided with a communication hole for communicating with the liquid outflow channel, and the end of the communication hole away from the liquid outflow channel is in communication with the outside; the clamping sleeve is provided with a switch door for opening and closing the communication hole.

[0011] Further, in the preferred embodiment of the utility model, the conductive shaft is further provided with a weight-reducing hole coaxially arranged with the cooling blind hole; and the weight-reducing hole is arranged between the brush holder and the basic machining platform.

[0012] Further, in the preferred embodiment of the utility model, the end of the internal liquid spraying channel away from the cooling blind hole penetrates the end surface of the conductive shaft and is in communication with the inside of the clamping sleeve.

[0013] Further, in the preferred embodiment of the utility model, still include the cap for cover set sleeve.

[0014] The electrolytic electric spark milling multifunctional milling head mounting device has the advantages that:

[0015] The electrolytic electric spark milling multifunctional milling head mounting device comprises a conductive shaft and an automatic liquid unloading assembly arranged in a cooling blind hole.

[0016] (1) the liquid supply connecting device of the internal spray liquid milling head is provided, the internal spray liquid electrode milling head is quickly connected with the liquid supply system, the cooling blind hole in communication with the internal spray liquid channel is arranged in the conductive shaft, the cutting fluid enters the conductive shaft and then enters the cooling blind hole through the internal spray liquid channel, the heat generated by the conductive shaft due to contact friction with the brush is absorbed and dispersed, the conductive shaft is well cooled, and the problem that the cutting fluid in the cooling blind hole, which absorbs the heat generated by the conductive shaft due to contact friction with the brush, is difficult to discharge and replace is solved;

[0017] (2) the replacement and discharge of the cutting fluid in the cooling blind hole can be completed only by relying on the gravity of the cutting fluid, the degree of automation is high, and the operation is convenient;

[0018] (3) the self weight is relatively light, and the time, labor and energy consumed during transportation, disassembly and operation are smaller.

[0019] (4) the brush assembly is arranged on the conductive shaft to realize electrode connection of the electrode milling head; the basic machining platform is arranged on the conductive shaft to realize quick docking installation or disassembly of the mounting device and the basic machining platform; the sleeve is installed on the conductive shaft and can be used for quick clamping installation and replacement of electrode milling heads of different specifications within a certain range, and is applicable to electrode milling heads and ordinary milling heads, the quick switching of the electrode milling heads and the ordinary milling heads can be realized, the internal spray liquid device is arranged, the overall structure has high integration, and the milling head installation and replacement process of the ECDM milling equipment platform and the development of the internal spray liquid surrounding equipment are simplified. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation to the scope, and for ordinary skilled in the art, other related drawings can be obtained without creative labor on the premise of the drawings.

[0021] Figure 1The partial sectional view of the multifunctional milling head mounting device for electrolytic electric spark milling provided by the embodiment of the utility model is in the first use state;

[0022] Figure 2 The partial sectional view of the multifunctional milling head mounting device for electrolytic electric spark milling provided by the embodiment of the utility model is in the second use state;

[0023] Figure 3 For Figure 2 The A area enlarged view of the multifunctional milling head mounting device for electrolytic electric spark milling provided by the embodiment of the utility model is shown in the figure.

[0024] Icon: 10-multifunctional milling head mounting device for electrolytic electric spark milling, 20-basic machining platform, 100-conductive shaft, 200-automatic liquid unloading assembly, 300-cap, 400-sleeve, 500-mounting sleeve, 600-brush holder, 700-internal liquid spraying device, 110-internal liquid spraying channel, 120-cooling blind hole, 121-cooling hole, 122-moving hole, 130-weight reduction hole, 140-liquid outflow channel, 210-elastic member, 220-separation plate, 410-communication hole, 420-switch door. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be described clearly and completely below in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the utility model.

[0027] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] Embodiment 1

[0029] The following will be combined with the drawings Figures 1-3 Further description of the utility model:

[0030] The utility model provides a multifunctional milling head mounting device 10 for electrolytic electric spark milling, please refer to Figures 1-3The electrolytic electrospark milling multifunctional milling head mounting device 10 comprises a conductive shaft 100, an automatic liquid unloading assembly 200 and a cap 300.

[0031] It should be noted that the structures not mentioned in the present application can refer to the relevant parts in the patent "CN201920806074.2 electrolytic electrospark milling multifunctional milling head mounting device 10" of the same department.

[0032] The conductive shaft 100 is detachably connected to the base machining platform 20 at one end and is provided with a clamping sleeve 400 for fixing the milling head at the other end. The cap 300 is used to cover the clamping sleeve 400 and is detachably connected to the clamping sleeve 400. The conductive shaft 100 is sequentially provided with a mounting sleeve 500 and a brush holder 600 from the end close to the clamping sleeve 400 to the end close to the base machining platform 20.

[0033] The conductive shaft 100 is rotatably connected to the mounting sleeve 500 and the brush holder 600. The mounting sleeve 500 is provided with an internal liquid injection device 700. The conductive shaft 100 is provided with an internal liquid injection channel 110 connected to the internal liquid injection device 700 and a cooling blind hole 120 coaxially arranged with the internal liquid injection channel 110. The cooling blind hole 120 is arranged between the mounting sleeve 500 and the base machining platform 20. The end of the internal liquid injection channel 110 away from the cooling blind hole 120 penetrates the end surface of the conductive shaft 100 and communicates with the inside of the clamping sleeve 400. The conductive shaft 100 is also provided with a weight-reducing hole 130 coaxially arranged with the cooling blind hole 120, which is arranged between the brush holder 600 and the base machining platform 20.

[0034] In the present embodiment, the automatic liquid unloading assembly 200 is arranged in the cooling blind hole 120. The automatic liquid unloading assembly 200 comprises an elastic member 210 and a partition plate 220. The elastic member 210 is arranged perpendicular to the axis of the cooling blind hole 120. One end of the elastic member 210 is connected to the inner wall of the cooling blind hole 120, and the other end is connected to the partition plate 220. The partition plate 220 divides the cooling blind hole 120 into a cooling hole 121 and a movable hole 122.

[0035] The conductive shaft 100 is provided with a liquid outflow channel 140 capable of communicating with the outside. When the elastic member 210 is not extruded, the liquid outflow channel 140 communicates with the movable hole 122, and the elastic member 210 can be extruded to make the liquid outflow channel 140 communicate with the cooling hole 121. The clamping sleeve 400 is provided with a communication hole 410 for communicating with the liquid outflow channel 140. The end of the communication hole 410 away from the liquid outflow channel 140 communicates with the outside, and the clamping sleeve 400 is provided with a switch door 420 for opening and closing the communication hole 410.

[0036] The multifunctional milling head mounting device 10 for electrolytic electro-discharge milling provided by the embodiment works as follows: in use, the shank of the conductive shaft 100 is clamped into the end face of the driving mechanism (rotary main shaft) of the basic machining platform 20 (numerical control milling machine), and is locked by the locking device; when electrolytic electro-discharge milling is performed, the electrode milling head is clamped on the sleeve 400, the numerical control milling machine is started, the brush assembly mounted on the brush holder 600 is electrified, the conductive shaft 100 rotates to drive the electrode milling head to rotate, and the workpiece fixed on the machining table of the numerical control milling machine is subjected to electrolytic electro-discharge milling.

[0037] At this time, the inner spraying liquid device 700 provides inner spraying cutting fluid for the electrode milling head, facilitating electrolytic machining of the inner spraying liquid, and part of the cutting fluid enters the cooling blind hole 120, rotates in the cooling blind hole 120 along with the conductive shaft 100, absorbs and disperses the heat generated by the conductive shaft 100 due to contact friction and conduction with the brush, and plays a good heat dissipation role on the conductive shaft 100. At this time, the switch door 420 is closed. After the conductive shaft 100 stops rotating, the conductive shaft 100 is adjusted so that the cooling hole 121 of the cooling blind hole 120 is located above the movable hole 122. At this time, the cap 300 covers the sleeve 400, the inner spraying liquid device 700 is opened to input cutting fluid into the inner spraying liquid channel 110, the cutting fluid continuously enters the cooling blind hole 120, the cutting fluid that the partition plate 220 bears is heavier, the partition plate 220 moves downward to connect the cooling hole 121 and the liquid outflow channel 140, the switch door 420 of the communication hole 410 is opened, at this time, the cutting fluid in the cooling hole 121 continuously flows out of the conductive shaft 100 through the liquid outflow channel 140 and the communication hole 410, plays a role of automatically discharging the heat-absorbing cutting fluid and replacing the cutting fluid in the cooling blind hole 120. When the gravity of the cutting fluid in the cooling hole 121 is less than the elastic force of the elastic member 210, the partition plate 220 moves upward to separate the cooling hole 121 and the liquid outflow channel 140. At this time, the conductive shaft 100 no longer discharges the cutting fluid.

[0038] In summary, the multifunctional milling head mounting device 10 for electrolytic electro-discharge milling provided by the embodiment not only can provide a liquid supply connection device for an inner spraying liquid milling head, but also can solve the problem that the cutting fluid in the cooling blind hole 120 that absorbs the heat generated by the contact friction and conduction of the conductive shaft 100 with the brush is difficult to discharge and replace, and the replacement and discharge of the cutting fluid in the cooling blind hole 120 can be completed only by relying on the gravity of the cutting fluid itself, which has high automation degree and is convenient to operate.

[0039] The preferred embodiments of the utility model are merely used for limiting the utility model, and for those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multifunctional milling head mounting device for electrochemical spark milling, comprising a conductive shaft, one end of which is detachably connected with a base machining platform, and the other end of which is provided with a clamping sleeve for fixing a milling head, an installation sleeve and a brush holder being sequentially sleeved on the conductive shaft from the end close to the clamping sleeve to the end close to the base machining platform; the conductive shaft is rotatably connected with the installation sleeve and the brush holder, the installation sleeve is provided with an internal liquid injection device, the conductive shaft is provided with an internal liquid injection channel connected with the internal liquid injection device and in communication with the internal liquid injection device, and a cooling blind hole coaxially arranged and in communication with the internal liquid injection channel, characterized in that, The cooling blind hole is arranged between the mounting sleeve and the base machining platform, and further comprises an automatic liquid discharging assembly arranged in the cooling blind hole; The automatic liquid discharging assembly comprises an elastic member and a partition plate; the elastic member is arranged in a direction perpendicular to the axis of the cooling blind hole; one end of the elastic member is connected to the inner wall of the cooling blind hole, and the other end is connected to the partition plate; the partition plate divides the cooling blind hole into a cooling hole and a movable hole; the conductive shaft is provided with a liquid outflow channel capable of communicating with the outside; when the elastic member is not compressed, the liquid outflow channel communicates with the movable hole; the elastic member can be compressed to make the liquid outflow channel communicate with the cooling hole.

2. The multi-functional tool post mounting device for electrolytic spark milling according to claim 1, wherein The sleeve is provided with a communication hole for communicating with the liquid outflow channel; one end of the communication hole, which is away from the liquid outflow channel, communicates with the outside; the sleeve is provided with a switch door for opening and closing the communication hole.

3. The multi-functional tool post mounting device for electrolytic spark milling according to claim 1, wherein The conductive shaft is further provided with a weight-reducing hole coaxially arranged with the cooling blind hole; the weight-reducing hole is arranged between the brush holder and the base machining platform.

4. The multi-functional tool post mounting device for electrolytic spark milling according to claim 1, wherein One end of the inner liquid injection channel, which is away from the cooling blind hole, penetrates the end surface of the conductive shaft and communicates with the inside of the sleeve.

5. The multi-functional tool post mounting device for electrolytic spark milling according to claim 4, wherein Further comprising a cap for covering the sleeve.

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