CN209998505U

CN209998505U - constant-tension mechanism for molybdenum wire and linear cutting machine

Info

Publication number: CN209998505U
Application number: CN201920063783.6U
Authority: CN
Inventors: 林延安
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-15
Filing date: 2019-01-15
Publication date: 2020-01-31
Anticipated expiration: 2029-01-15

Abstract

The utility model discloses an molybdenum filament constant tension mechanism belongs to wire cut electrical discharge machining bed technical field, and it includes adjustment mechanism, adjustment mechanism includes control motor, installing support, drive wheel and screw rod, the screw rod is installed on the installing support, and the screw rod is rotated by the control motor drive, installs on the screw rod rather than forming the vice driven removal slider of spiral, and the drive wheel is installed promptly on removing the slider, the wheel face and the molybdenum filament contact of drive wheel, control motor and controller electric connection, the beneficial effects of the utility model are that through pressure sensor's real-time detection and the real-time action of control motor, the tension that realizes the molybdenum filament that can be accurate is invariable to molybdenum filament constant tension mechanism's design is comparatively simple, can also play the effect of replacing current row's wire wheel, helps reducing cost and simplified structure, and whole mechanism is nimble variable, can adjust by oneself according to the in service behavior.

Description

constant-tension mechanism for molybdenum wire and linear cutting machine

Technical Field

The utility model relates to an wire cut electrical discharge machining bed specifically is kind molybdenum filament constant tension mechanism, wire cut electrical discharge machining bed.

Background

A wire-cut electric discharge machine belongs to the field of electric machining, and when the phenomenon and reason that a switch contact is damaged by spark discharge corrosion are researched by Lazaita Kowife of former Soviet Union, the phenomenon and reason that local metal can be melted and oxidized by instantaneous high temperature of electric discharge can be corroded, so that an electric discharge machining method is created and invented.

The reciprocating wire-moving electric spark wire-cutting machine tool is wire-moving machine tools with wire-moving speed of 6-12 mm/s, the reciprocating wire-moving machine tool cannot implement constant tension control on the electrode wire, so the electrode wire shakes greatly, and the wire is easy to break in the machining process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide kinds of molybdenum filament constant tension mechanism, wire cut electrical discharge machining bed to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

constant tension mechanism for molybdenum wire, comprising an adjusting mechanism, wherein the adjusting mechanism comprises a control motor, a mounting bracket, a driving wheel and a screw, the screw is mounted on the mounting bracket, the screw is driven by the control motor to rotate, a movable slider forming screw pair transmission with the screw is mounted on the screw, the driving wheel is mounted on the movable slider, the wheel surface of the driving wheel is in contact with the molybdenum wire, and the control motor is electrically connected with a controller.

The utility model adopts the scheme that the step is carried out again, the device further comprises a pressure sensor, a pressure bearing part of the pressure sensor is contacted with the molybdenum wire, the pressure sensor is electrically connected with the controller, an encoder is also arranged at the output end of the control motor, and the encoder is electrically connected with the controller.

According to the scheme of steps of the utility model, the number of the adjusting mechanisms is two, and the wheel surfaces of the driving wheels on the two groups of adjusting mechanisms are respectively contacted with the molybdenum wires which are about to enter the working area and return from the working area.

According to the scheme of the utility model, steps are advanced again, the mounting bracket comprises an upper bracket and a lower bracket, a corotation screw rod and a reversal screw rod are respectively installed in the upper bracket and the lower bracket, the ends of the corotation screw rod and the reversal screw rod are fixedly connected or connected through a coupler, the corotation screw rod is driven to rotate by a control motor, the corotation screw rod and the reversal screw rod are respectively provided with a movable slider which forms spiral auxiliary transmission with the corotation screw rod, the thread directions of the corotation screw rod and the reversal screw rod are opposite, the driving wheel comprises an upper driving wheel and a lower driving wheel, the upper driving wheel and the lower driving wheel are respectively installed on the movable sliders on the corotation screw rod and the reversal screw rod, and the wheel surfaces of the upper driving wheel and the lower driving wheel are respectively contacted.

Linear cutting machine, including wire storage cylinder and molybdenum wire, the wire storage cylinder is coiled with molybdenum wire, the molybdenum wire of the wire storage cylinder passes through several wire guide wheels and then is coiled on the wire storage cylinder again, forming a loop, also includes the molybdenum wire constant tension mechanism.

As a scheme for steps of the utility model, an upper wire wheel and/or a lower wire wheel are arranged at the position of side of the wire storage cylinder.

Compared with the prior art, the beneficial effects of the utility model are that: the tension of the molybdenum wire can be accurately constant by real-time detection of the pressure sensor and real-time action of the control motor, the design of the constant tension mechanism of the molybdenum wire is simple, the constant tension mechanism of the molybdenum wire can also replace the existing wire arranging wheel, the cost is reduced, the structure is simplified, the whole mechanism is flexible and variable, and the constant tension mechanism can be adjusted automatically according to the use condition.

Drawings

Fig. 1 is a schematic structural diagram of a constant tension mechanism of molybdenum wires (the adjusting mechanism is single).

Fig. 2 is a schematic structural diagram of a constant tension mechanism of molybdenum wires (two adjusting mechanisms share a control motor).

Fig. 3 is a schematic structural diagram of a constant tension mechanism of molybdenum wires (two adjustment mechanisms do not share a control motor).

Fig. 4 is a structural schematic view of linear cutting machine (the adjusting mechanism is two and does not share a control motor).

Fig. 5 is a structural schematic view of linear cutting machine (the adjusting mechanism is two and shares the control motor).

In the figure: 1-wire storage cylinder, 2-molybdenum wire, 3-upper wire discharging wheel, 4-lower wire discharging wheel, 5-control motor, 6-mounting bracket, 601-upper bracket, 602-lower bracket, 7-driving wheel, 701-upper driving wheel, 702-lower driving wheel, 8-screw rod, 801-forward rotation screw rod, 802-reverse rotation screw rod and 9-pressure sensor.

Detailed Description

The embodiments described in the exemplary embodiments below do not represent all embodiments consistent with the present disclosure at , but rather are merely examples of apparatus and methods consistent with the aspects of the present disclosure at as detailed in the appended claims.

Example 1

Referring to fig. 1, in the embodiment of the present invention, molybdenum filament constant tension mechanisms include an adjusting mechanism, the adjusting mechanism includes a control motor 5, a mounting bracket 6, a driving wheel 7 and a screw 8, the screw 8 is mounted on the mounting bracket 6, the screw 8 is driven by the control motor 5 to rotate, in this embodiment, the control motor 5 may be a servo motor, the driving precision is high, and the precise adjustment function can be ensured, a movable slider forming a screw pair transmission with the screw 8 is mounted on the screw 8, the driving wheel 7 is mounted on the movable slider, a wheel surface of the driving wheel 7 contacts with the molybdenum filament 2, when the control motor 5 drives the screw 8 to rotate, the movable slider can move up and down through the action of the screw pair, and further adjust the tension of the molybdenum filament 2, and the control motor 5 is electrically connected with a controller.

, in order to ensure the constant tension, the embodiment further discloses a pressure sensor 9, preferably, the pressure sensor 9 is installed at a position close to the working area of the molybdenum wire 2, a pressure-bearing portion of the pressure sensor 9 contacts the molybdenum wire 2, the tension of the molybdenum wire 2 is determined by the pressure sensor 9, the pressure sensor 9 is electrically connected to the controller, and pressure data can be fed back to the controller, for example, when the tension of the molybdenum wire 2 is small, the controller can control the control motor 5 to operate, and adjust the pressure until the tension of the molybdenum wire 2 reaches a set requirement, of course, an encoder is also installed at an output end of the control motor 5, and is electrically connected to the controller, and the encoder is used for feeding back the rotation speed information of the control motor 5 in real time to realize closed-loop control of the rotation speed of the control motor 5, which belongs to the prior art, and is not described in much.

Example 2

Referring to fig. 3, in the embodiment of the present invention, molybdenum wire constant tension mechanisms are based on the above-mentioned embodiment, since the molybdenum wire 2 forms loops in the actual movement and there are an outlet end and an outlet end, in this embodiment, the adjusting mechanisms are set into two groups, and the wheel surfaces of the driving wheels 7 on the two groups of adjusting mechanisms are respectively in contact with the molybdenum wire 2 about to enter the working area and return from the working area.

The above design is suitable for the case that the distance between the molybdenum wire 2 outlet end and the molybdenum wire receiving end is relatively far, and for the case that the distance between the molybdenum wire 2 outlet end and the molybdenum wire receiving end is relatively close, the cost is not increased by using the above method, so in the embodiment:

referring to fig. 2, the mounting bracket 6 includes an upper bracket 601 and a lower bracket 602, a forward rotation screw 801 and a reverse rotation screw 802 are respectively mounted in the upper bracket 601 and the lower bracket 602, ends of the forward rotation screw 801 and the reverse rotation screw 802 are fixedly connected or connected through a coupling, the forward rotation screw 801 is driven to rotate by a control motor 5, that is, the forward rotation screw 801 and the reverse rotation screw 802 can be driven to rotate by motors, of course, the forward rotation screw 801 and the reverse rotation screw 802 are respectively provided with a movable slider forming a screw pair transmission therewith, the transmission wheel 7 includes an upper transmission wheel 701 and a lower transmission wheel 702, the upper transmission wheel 701 and the lower transmission wheel 702 are respectively mounted on the movable sliders on the forward rotation screw 801 and the reverse rotation screw 802, and wheel surfaces of the upper transmission wheel 701 and the lower transmission wheel 702 are respectively in contact with the molybdenum wire 2 about to enter into a working area and return from.

Here, it should be noted that "forward rotation" and "reverse rotation" in the forward rotation screw 801 and the reverse rotation screw 802 only indicate states of the two screws, and actually, the forward rotation screw 801 and the reverse rotation screw 802 are different in that thread directions of the two screws are opposite, and at this time, after the control motor 5 is powered on, the upper transmission wheel 701 and the lower transmission wheel 702 can move toward or away from each other, so as to adjust the tension of the molybdenum wire 2.

Example 3

Referring to fig. 4 to 5, an embodiment of the present invention further provides an wire cutting machine, which includes a wire storage barrel 1 and a molybdenum wire 2, the molybdenum wire 2 is wound on the wire storage barrel 1, the molybdenum wire 2 of the wire storage barrel 1 passes through a plurality of wire guiding wheels and then is rewound on the wire storage barrel 1 to form a loop, and a wire cutting processing area is located in an area between the wire guiding wheels, and the wire cutting machine further includes the molybdenum wire constant tension mechanism according to the above embodiment.

In order to guide the movement of the molybdenum wire 2, an upper wire wheel 3 and/or a lower wire wheel 4 are further installed at the position side of the wire storage barrel 1, specifically, how the upper wire wheel 3 and the lower wire wheel 4 are selected is determined according to a constant tension mechanism of the molybdenum wire, as can be seen from fig. 4-5, because the design of the driving wheel 7 can completely replace the upper wire wheel 3 and the lower wire wheel 4, the cost can be reduced, the mechanism is smaller, and the occupied area is reduced.

It should be particularly noted that, in the technical scheme, the real-time detection of the pressure sensor 9 and the real-time action of the control motor 5 can accurately realize the constant tension of the molybdenum wire 2, the design of the constant tension mechanism of the molybdenum wire is simpler, the constant tension mechanism of the molybdenum wire can also play a role in replacing the existing wire arranging wheel, the cost is reduced, the structure is simplified, the whole mechanism is flexible and variable, and the constant tension mechanism can be automatically adjusted according to the use condition.

This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the -like principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains and as may be applied to the essential features hereinbefore set forth, the description and examples are to be regarded as illustrative rather than limiting, the true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

The constant tension mechanism for the molybdenum wires comprises an adjusting mechanism and is characterized in that the adjusting mechanism comprises a control motor (5), a mounting bracket (6), a driving wheel (7) and a screw rod (8), the screw rod (8) is mounted on the mounting bracket (6), the screw rod (8) is driven to rotate by the control motor (5), a movable sliding block which forms spiral pair transmission with the screw rod (8) is mounted on the screw rod (8), the driving wheel (7) is mounted on the movable sliding block, the wheel surface of the driving wheel (7) is in contact with the molybdenum wires (2), and the control motor (5) is electrically connected with a controller.
2. The molybdenum wire constant tension mechanism according to claim 1, further comprising a pressure sensor (9), wherein the pressure bearing portion of the pressure sensor (9) is in contact with the molybdenum wire (2), the pressure sensor (9) is electrically connected with a controller, and an encoder is further installed at the output end of the control motor (5) and electrically connected with the controller.
3. The molybdenum wire constant tension mechanism according to claim 1 or 2, wherein the number of the adjusting mechanisms is two, and the wheel surfaces of the driving wheels (7) on the two groups of adjusting mechanisms are respectively contacted with the molybdenum wires (2) which are about to enter into the working area and return from the working area.
4. The constant tension mechanism Mo wire as claimed in claim 3, wherein the mounting bracket (6) comprises an upper bracket (601) and a lower bracket (602), the upper bracket (601) and the lower bracket (602) are respectively provided with a forward rotation screw (801) and a reverse rotation screw (802), the ends of the forward rotation screw (801) and the reverse rotation screw (802) are fixedly connected or connected through a coupling, the forward rotation screw (801) is driven by the control motor (5) to rotate, the forward rotation screw (801) and the reverse rotation screw (802) are respectively provided with a movable slider forming a screw pair transmission with the forward rotation screw (801) and the reverse rotation screw (802), the screw rotation directions of the forward rotation screw (801) and the reverse rotation screw (802) are opposite, the transmission wheel (7) comprises an upper transmission wheel (701) and a lower transmission wheel (702), the upper transmission wheel (701) and the lower transmission wheel (702) are respectively arranged on the movable sliders on the forward rotation screw (801) and the reverse rotation screw (802), and the wheel surfaces of the upper transmission wheel (701) and the lower transmission wheel (702) are respectively contacted with the Mo wire (2) to be fed.
5, wire cutting machine, including wire storage cylinder (1) and molybdenum filament (2), the winding has molybdenum filament (2) on wire storage cylinder (1), the molybdenum filament (2) of wire storage cylinder (1) passes through a plurality of wire guide wheels and rewinds on wire storage cylinder (1), forms the return circuit, characterized by, still include according to claim 1 ~ 4 any the constant tension mechanism of molybdenum filament.
6. Linear cutting machine according to claim 5, characterized in that the wire storage cylinder (1) is also mounted with an upper wire wheel (3) and/or a lower wire wheel (4) at the side .