Automatic wire clamping device for wire cylinder and medium-speed wire cutting machine tool

Abstract

The utility model discloses an automatic wire clamping device for a wire cylinder and a medium-speed wire cutting machine tool. The automatic wire clamping device for the wire cylinder comprises a first wire cylinder seat; the wire cylinder is rotationally connected with the first wire cylinder seat and can rotate around the axis of the wire cylinder, and through holes are formed in the peripheral wall of the wire cylinder; the first driving mechanism is in transmission connection with the wire cylinder and used for driving the wire cylinder to rotate; the telescopic mechanism comprises a guide rod, and the guide rod penetrates through the through hole and is in sliding connection with the wire cylinder; the wire pressing piece is located outside the wire cylinder and connected to the guide rod; the second driving mechanism is arranged on the inner side of an annular motion trail formed by rotation of the guide rod along with the wire cylinder, and is configured to be capable of pushing the guide rod towards the outside of the wire cylinder along the axial direction of the guide rod so as to enable the wire pressing piece to move from the wire clamping position to the opening position; when the wire pressing piece abuts against the peripheral face of the wire cylinder, the wire pressing piece is located at the wire clamping position, and when the wire pressing piece is separated from the wire cylinder, the wire pressing piece is located at the opening position. According to the embodiment of the utility model, automatic wire clamping and wire releasing can be realized, and the structure is simple and compact.

Description

Technical Field

[0001] The utility model relates to the field of mechanical equipment, and more specifically, to an automatic wire clamping device for a wire spool and a middle-wire electrical discharge wire cutting machine tool. Background Art

[0002] The automatic wire clamping device for the wire spool of a middle-wire electrical discharge wire cutting machine tool is used to realize the automatic clamping and releasing of the wire. The existing wire spool clamping device mainly includes a first driving mechanism, a wire spool, a wire spool seat, a triggering mechanism horizontally arranged along the axial direction of the wire spool, a telescopic mechanism vertically arranged along the radial direction of the wire spool, and a wire pressing member. By the triggering surface of the triggering mechanism pushing the mating surface of the telescopic mechanism, automatic wire clamping and wire releasing are realized. The triggering mechanism and the telescopic mechanism of the existing wire spool clamping device are complex in structure and have high requirements for mutual cooperation, thus resulting in a relatively complex structure of the automatic wire clamping device for the wire spool, high requirements for part processing, and high assembly difficulty. Summary of the Utility Model

[0003] An embodiment of the utility model provides an automatic wire clamping device for a wire spool, including:

[0004] A first wire spool seat;

[0005] A wire spool, rotatably connected to the first wire spool seat, capable of rotating around its own axis, and having a through hole provided on its peripheral wall;

[0006] A first driving mechanism, drivingly connected to the wire spool for driving the wire spool to rotate;

[0007] A telescopic mechanism, including a guide rod, the guide rod passing through the through hole and being slidably connected to the wire spool;

[0008] A wire pressing member, located outside the wire spool and connected to the guide rod;

[0009] A second driving mechanism, arranged inside the circular motion track formed by the guide rod following the rotation of the wire spool, configured to be able to push the guide rod axially outward of the wire spool along the guide rod so that the wire pressing member moves from the wire clamping position to the open position;

[0010] Wherein, when the wire pressing member abuts against the outer peripheral surface of the wire spool, the wire pressing member is in the wire clamping position, and when the wire pressing member is separated from the wire spool, the wire pressing member is in the open position.

[0011] In some exemplary embodiments, the second driving mechanism is a cylinder, one end of the cylinder is relatively fixed to the first wire spool seat, and the other end of the cylinder faces the radially outward direction of the wire spool;

[0012] The telescopic direction of the cylinder, the sliding direction of the guide rod, and the extending direction of the guide rod are all parallel to the radial direction of the wire spool.

[0013] In some exemplary embodiments, the automatic wire clamping device for the wire spool further includes a fixing plate, which is connected to the wall surface of the first wire spool seat facing the wire spool and extends into one end of the wire spool;

[0014] One end of the air cylinder is connected to the fixing plate to achieve relative fixation with the first wire spool seat.

[0015] In some exemplary embodiments, the second driving mechanism is an air cylinder, including a cylinder body and a push rod extending from the cylinder body. The cylinder body is connected to the fixing plate, and the push rod can extend radially along the wire spool to push the guide rod.

[0016] In some exemplary embodiments, the telescopic mechanism includes an elastic reset member, which is used to apply an elastic force to the guide rod so that the wire pressing member can return to the wire clamping position when the second driving mechanism stops applying a thrust to the guide rod.

[0017] In some exemplary embodiments, one end of the elastic reset member abuts against the guide rod, the other end of the elastic reset member abuts against the inner peripheral surface of the wire spool, and the elastic reset member is in a compressed elastic deformation state.

[0018] In some exemplary embodiments, the telescopic mechanism further includes a first guiding member, which is connected to the wall surface of the wire spool facing the first wire spool seat;

[0019] The first guiding member is provided with a guiding hole, and the guide rod passes through the guiding hole and is in clearance fit with the guiding hole.

[0020] In some exemplary embodiments, the automatic wire clamping device for the wire spool further includes: a second wire spool seat, located on the side of the wire spool facing away from the first wire spool seat, and the wire spool is rotatably connected to the second wire spool seat.

[0021] In some exemplary embodiments, the cross section of the fixing plate is in an inverted "L" shape to contact the top and side of the air cylinder respectively.

[0022] An embodiment of the present invention provides a middle-wire electrical discharge machine tool, including the automatic wire clamping device for the wire spool according to any one of the foregoing claims.

[0023] In the embodiment of the present invention, by controlling the second driving mechanism to drive the guide rod of the telescopic mechanism and automatically retracting through the telescopic mechanism under elastic force, automatic wire clamping and wire releasing can be achieved. The automatic wire clamping device for the wire spool makes the wire clamping and wire releasing operations more convenient, and has a simple and compact structure, is easy to process and assemble, and has high reliability. Installing this automatic wire clamping device for the wire spool only requires simple modification of the original equipment, and the modification cost is low.

[0024] Other features and advantages of the present utility model will be described in the following specification. Moreover, some of them will become apparent from the specification or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures specifically pointed out in the specification and the accompanying drawings. Description of the Drawings

[0025] The accompanying drawings are used to provide a further understanding of the technical solution of the present utility model, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present utility model and do not constitute a limitation to the technical solution of the present utility model.

[0026] Figure 1 It is a schematic cross-sectional structure diagram of an automatic wire clamping device for a wire spool provided for an embodiment of the present utility model;

[0027] Figure 2 For Figure 1 a partial enlarged structure diagram of part A of the automatic wire clamping device for the wire spool;

[0028] Figure 3 For Figure 1 a structure diagram of the automatic wire clamping device for the wire spool observed from one end of the first wire spool seat;

[0029] Figure 4 For Figure 1 a structure diagram of the automatic wire clamping device for the wire spool observed from one end of the wire spool.

[0030] Reference Signs:

[0031] 100 - Automatic wire clamping device for wire spool;

[0032] 1 - First wire spool seat, 101 - Wall surface, 102 - Groove; 2 - Wire spool, 201 - Through hole, 202 - Outer peripheral surface, 203 - Inner peripheral surface, 204 - Wall surface; 3 - First driving mechanism; 4 - Telescopic mechanism, 401 - Guide rod, 402 - Elastic reset member; 5 - Wire pressing member; 6 - Second driving mechanism, 601 - Cylinder body, 602 - Push rod; 7 - Fixed plate, 701 - First part, 702 - Second part; 8 - First guiding member, 801 - Guiding hole; 9 - Second wire spool seat; 10, 11, 12 - Screws. Detailed Embodiments

[0033] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0034] The present utility model provides an automatic wire clamping device 100 for a wire drum, such as Figures 1 to 4 As shown, it includes: a first wire reel seat 1, a wire reel 2, a first driving mechanism 3, a second driving mechanism 6, a telescopic mechanism 4 and a wire pressing piece 5.

[0035] The first wire reel seat 1 is a mounting base for the wire reel 2 , the first driving mechanism 3 , and the second driving mechanism 6 .

[0036] The wire drum 2 is configured to be roughly cylindrical. The wire drum 2 is rotatably connected to the first wire drum seat 1 and can rotate around its own axis. A through hole 201 is provided on the peripheral wall of the wire drum 2. The first driving mechanism 3 is transmission-connected to the wire drum 2 and is used to drive the wire drum 2 to rotate.

[0037] The telescopic mechanism 4 includes a guide rod 401. The guide rod 401 is a straight rod. The guide rod 401 is inserted into the through hole 201 and is slidably connected to the wire tube 2. The guide rod 401 can slide into the wire tube 2 and out of the wire tube 2.

[0038] The wire pressing piece 5 can be constructed as a plate-like structure, and the wire pressing piece 5 is located outside the wire barrel 2 and connected to one end of the guide rod 401 extending out of the wire barrel 2. The wire pressing piece 5 can move closer to and farther from the wire barrel 2 as the guide rod 401 slides. The wire pressing piece 5 can move to a self-clamping position abutting against the outer peripheral surface 202 of the wire barrel 2, and the wire pressing piece 5 can also move to an open position separated from the outer peripheral surface 202 of the wire barrel 2. That is, when the wire pressing piece 5 abuts against the outer peripheral surface 202 of the wire barrel 2, the wire pressing piece 5 is located at the wire clamping position, and when the wire pressing piece 5 is separated from the wire barrel 2, the wire pressing piece 5 is located at the open position.

[0039] The second driving mechanism 6 is arranged inside the annular motion track formed by the guide rod 401 following the rotation of the wire drum 2. The second driving mechanism 6 is configured to push the guide rod 401 outwardly of the wire drum 2 along the axial direction of the guide rod 401 so that the wire pressing member 5 moves from the wire clamping position to the open position.

[0040] like Figure 1As shown, a first driving mechanism 3 (for example, a motor) can drive the wire spool 2 to rotate, and the guide rod 401 can rotate together with the wire spool 2. The wire spool 2 can rotate relative to the first wire spool seat 1, and the first wire spool seat 1 provides support and limit for the rotation of the wire spool 2. When the wire spool 2 is in the set position, the second driving mechanism 6 is arranged inside the circular motion track formed by the guide rod 401 following the rotation of the wire spool 2 (that is, in the radial direction of the wire spool 2, it is located more inside and closer to the center of the wire spool 2). Such an arrangement enables the guide rod 401 not to interfere with the second driving mechanism 6 when following the rotation of the wire spool 2, and the wire spool 2 can rotate freely. By controlling the second driving mechanism 6, the second driving mechanism 6 pushes the guide rod 401 outward along the axial direction of the guide rod 401, causing the guide rod 401 to slide outward from the wire spool 2. Since one end of the guide rod 401 passes through the through hole 201 of the wire spool 2 and is connected to the wire pressing member 5, the sliding of the guide rod 401 drives the wire pressing member 5 away from the outer peripheral surface 202 of the wire spool 2. At this time, the wire pressing member 5 is in the open position, and a wire (for example, an electrode wire) can be placed between the wire pressing member 5 and the outer peripheral surface 202 of the wire spool 2. Then, control the second driving mechanism 6 to retract inward along the radial direction of the wire spool 2. As a result, the second driving mechanism 6 is separated from the guide rod 401 of the telescopic mechanism 4, and the guide rod 401 returns to its original position under the action of the elastic force, that is, the guide rod 401 drives the wire pressing member 5 to move inward along the radial direction of the wire spool 2 to the wire clamping position. At this time, the wire pressing member 5 abuts against the outer peripheral surface 202 of the wire spool 2, thereby clamping the wire between the wire pressing member 5 and the outer peripheral surface 202 of the wire spool 2. After the second driving mechanism 6 retracts, it does not affect the normal rotation of the wire spool 2.

[0041] In summary, by controlling the driving of the telescopic mechanism 4 by the second driving mechanism 6 and by the automatic retraction of the guide rod 401 under the elastic force, automatic wire clamping and wire releasing can be achieved. The wire spool automatic wire clamping device 100 makes the wire clamping and wire releasing operations more convenient, and has a simple and compact structure, is easy to process and assemble, and has high reliability. Installing the wire spool automatic wire clamping device 100 only requires simple modification of the original equipment, and the modification cost is low.

[0042] In some exemplary embodiments, such as Figures 1 to 3As shown, the second driving mechanism 6 is a cylinder, and the cylinder can be a single-acting cylinder. One end (non-driving end) of the cylinder is directly or indirectly fixed relative to the first bobbin base 1 through another component, and the other end (driving end) of the cylinder faces radially outward of the bobbin 2; the telescopic direction of the cylinder, the sliding direction of the guide rod 401, and the extending direction of the guide rod 401 are all parallel to the radial direction of the bobbin 2. Of course, the second driving mechanism 6 is not limited to a cylinder, and can also be a hydraulic cylinder or the like. When the bobbin 2 is in a set position, the cylinder and the guide rod 401 face each other in the radial direction of the bobbin 2, the cylinder is located radially inside, and the guide rod 401 is located radially outside. The cylinder and the guide rod 401 are close to each other in the axial direction of the bobbin 2, and the movement paths of the cylinder and the guide rod 401 are along the radial direction of the bobbin 2, thus saving the space occupied by the automatic wire clamping device 100 for the bobbin 2 in the axial direction of the bobbin 2 and making the structure more compact. The cylinder and the guide rod 401 can be arranged in a narrow cavity formed between the adjacent corresponding ends of the first bobbin base 1 and the bobbin 2.

[0043] In some exemplary embodiments, such as Figures 1 to 3 As shown, the automatic wire clamping device 100 for the bobbin further includes a fixing plate 7 for fixing and installing the cylinder. A part of the fixing plate 7 is connected (for example, by screws 10, see Figure 3 ) to the wall surface 101 of the first bobbin base 1 facing the bobbin 2, and another part of the fixing plate 7 extends into one end of the bobbin 2 along the axial direction of the bobbin. One end (non-driving end) of the cylinder is connected to the fixing plate 7 to achieve relative fixation with the first bobbin base 1. The other end (driving end) of the cylinder is a free end for the cylinder to extend and retract. The cylinder can be first installed on the fixing plate 7, and then the fixing plate 7 is installed on the first bobbin base 1, so that the installation of the cylinder can be facilitated by providing the fixing plate 7.

[0044] In some exemplary embodiments, such as Figures 1 to 3 As shown, the cross-section of the fixing plate 7 is in an inverted "L" shape, and the inner wall surfaces of the first part 701 and the second part 702 forming the inverted "L" shape are respectively in contact with the top and side of the cylinder to position and fix the cylinder. The outer wall surface of the second part 702 of the fixing plate 7 is fixed to the wall surface 101 of the first bobbin base 1 facing the bobbin 2. A groove 102 is provided on the wall surface 101 of the first bobbin base 1 facing the bobbin 2. The shape of the groove 102 roughly corresponds to the shape of the second part 702 of the fixing plate 7, and the second part 702 of the fixing plate 7 can be placed in the groove 102 to facilitate the positioning of the fixing plate 7.

[0045] In some exemplary embodiments, such as Figures 1 to 3 As shown, the second driving mechanism 6 is a cylinder, including a cylinder body 601 and a push rod 602 extending from the cylinder body 601. The push rod 602 can extend and retract from one end of the cylinder body 601. The cylinder body 601 is connected (for example, by screws 11, seeFigure 3 ) For the fixed plate 7, when the air cylinder is activated, the push rod 602 can extend radially along the wire drum 2 to push the guide rod 401. A spring is provided inside the cylinder block 601, and the push rod 602 can be retracted by the action of the internal spring. One end of the guide rod 401 passes through the through hole 201 and is connected to the wire pressing member 5, and the opposite end of the guide rod 401 is pushed by the push rod 602. For the convenience of being pushed by the push rod 602, the other end of the guide rod 401 can be slightly extended in the axial direction of the wire drum 2 to be widened. When the air cylinder is activated, the air cylinder is connected to compressed air, and the push rod 602 is driven by the compressed air to extend radially outward along the wire drum 2 to push the guide rod 401 and the wire pressing member 5 to the open position. When the air cylinder is closed, the push rod 602 retracts radially inward along the wire drum 2 under the action of the internal spring of the air cylinder, and the guide rod 401 and the wire pressing member 5 automatically return to the wire clamping position. With this direct push structure of the air cylinder, when the air cylinder retracts, the wire drum 2 can rotate freely without interference with the second driving mechanism 6. In some exemplary embodiments, such as Figure 1 , Figure 2 and Figure 4 shown, the telescopic mechanism 4 includes an elastic reset member 402. The elastic reset member 402 can be a spring or other elastically deformable member. The elastic reset member 402 is used to apply an elastic force (radially inward along the wire drum 2) to the guide rod 401, so that when the second driving mechanism 6 stops applying a thrust to the guide rod 401, the guide rod 401 slides radially inward along the wire drum 2 under the elastic force of the elastic reset member 402, so that the wire pressing member 5 can move closer to the wire drum 2 and return to the wire clamping position under the drive of the guide rod 401. When the second driving mechanism 6 applies a thrust (radially outward along the wire drum 2) to the guide rod 401, the elastic reset member 402 applies an elastic force in the opposite direction to the thrust (radially inward along the wire drum 2) to the guide rod 401. When the thrust applied to the guide rod 401 is removed, this elastic force causes the guide rod 401 and the wire pressing member 5 to move radially inward along the wire drum 2 to the wire clamping position.

[0046] In some exemplary embodiments, such as Figure 1 , Figure 2 and Figure 4 shown, one end of the elastic reset member 402 abuts against the guide rod 401, the other end of the elastic reset member 402 abuts against the inner peripheral surface 203 of the wire drum 2, and the elastic reset member 402 is in a compressed elastic deformation state. The guide rod 401 is provided with a stepped portion, and one end of the elastic reset member 402 abuts against this stepped portion of the guide rod 401. When the guide rod 401 slides radially along the wire drum 2 relative to the wire drum 2, the elastic reset member 402 is in a compressed elastic deformation state between the stepped portion of the guide rod 401 and the inner peripheral surface 203 of the wire drum 2. When the thrust applied to the guide rod 401 is removed, the elastic force of the elastic reset member 402 drives the guide rod 401 to slide radially inward relative to the wire drum 2 to the wire clamping position.

[0047] In some exemplary embodiments, such as Figure 1 , Figure 2 and Figure 4 shown, the telescopic mechanism 4 further includes a first guide member 8. The first guide member 8 is connected (e.g., by screws 12, see Figure 4 ) to the wall surface 204 of the filament bobbin 2 facing the first filament bobbin base 1. The telescopic mechanism 4 can rotate together with the filament bobbin 2. The first guide member 8 is provided with a guide hole 801. The guide rod 401 passes through the guide hole 801 and is in clearance fit with the guide hole 801, so that the guide rod 401 can freely slide in the guide hole 801 without skewing. The guide hole 801 of the first guide member 8 can be concentric with the through hole 201. The guide hole 801 and the through hole 201 can jointly guide the sliding of the guide rod 401 relative to the filament bobbin 2 in the radial direction of the filament bobbin 2, ensuring smooth sliding of the guide rod 401.

[0048] In some exemplary embodiments, such as Figure 1 shown, the automatic filament clamping device 100 for the filament bobbin further includes: a second filament bobbin base 9, located on the side of the filament bobbin 2 opposite to the first filament bobbin base 1. The filament bobbin 2 is rotatably connected to the second filament bobbin base 9, and the filament bobbin 2 can rotate relative to the second filament bobbin base 9. The first filament bobbin base 1 and the second filament bobbin base 9 respectively support the filament bobbin 2 from both ends, making the rotation of the filament bobbin 2 more stable.

[0049] The embodiment of the present utility model further provides a middle-wire electrical discharge machine tool, including the automatic filament clamping device 100 for the filament bobbin described in any of the above embodiments.

[0050] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "side", "opposite", "four corners", "periphery", "the 'kou' character structure", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the structure referred to has a specific orientation, is constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0051] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", "fixed connection" can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0052] Although the embodiments disclosed by the present utility model are as above, the content described is only the embodiments adopted for facilitating the understanding of the present utility model, and is not intended to limit the present utility model. Any person skilled in the art within the field to which the present utility model pertains may make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed by the present utility model. However, the scope of patent protection of the present utility model shall still be defined by the appended claims.

Claims

1. A wire drum automatic wire clamping device, characterized in that: include: First silk reel seat; A wire drum, rotatably connected to the first wire drum seat, capable of rotating around its own axis, and having a through hole on its peripheral wall; A first driving mechanism, drivingly connected to the wire drum, for driving the wire drum to rotate; The telescopic mechanism comprises a guide rod, the guide rod is passed through the through hole and is slidably connected to the wire drum; A wire pressing member, located outside the wire barrel and connected to the guide rod; A second driving mechanism is disposed inside the annular motion track formed by the guide rod following the rotation of the wire drum, and is configured to push the guide rod outward of the wire drum along the axial direction of the guide rod so that the wire pressing member moves from the wire clamping position to the open position; Wherein, when the wire pressing piece abuts against the outer circumferential surface of the wire drum, the wire pressing piece is located at the wire clamping position, and when the wire pressing piece is separated from the wire drum, the wire pressing piece is located at the opening position.

2. The automatic wire clamping device for a wire drum according to claim 1, characterized in that: The second driving mechanism is a cylinder, one end of which is relatively fixed to the first wire drum seat, and the other end of which is radially outward from the wire drum; The telescopic direction of the cylinder, the sliding direction of the guide rod and the extending direction of the guide rod are all parallel to the radial direction of the wire drum.

3. The automatic wire clamping device for a wire drum according to claim 2, characterized in that: It also includes a fixing plate, which is connected to the wall of the first wire tube seat facing the wire tube and extends into one end of the wire tube; One end of the cylinder is connected to the fixing plate to achieve relative fixation with the first wire drum seat.

4. The automatic wire clamping device for a wire drum according to claim 3, characterized in that: The second driving mechanism is a cylinder, comprising a cylinder body and a push rod extending from the cylinder body, the cylinder body is connected to the fixing plate, and the push rod can extend in the radial direction of the wire tube to push the guide rod.

5. The automatic wire clamping device for wire drum according to any one of claims 1 to 4, characterized in that: The telescopic mechanism comprises an elastic reset member, and the elastic reset member is used to apply elastic force to the guide rod so that the wire pressing member can return to the wire clamping position when the second driving mechanism stops applying thrust to the guide rod.

6. The automatic wire clamping device for a wire drum according to claim 5, characterized in that: One end of the elastic return member abuts against the guide rod, the other end of the elastic return member abuts against the inner circumferential surface of the wire drum, and the elastic return member is in a compressed elastic deformation state.

7. The automatic wire clamping device for a wire drum according to claim 6, characterized in that: The telescopic mechanism further comprises a first guide member, wherein the first guide member is connected to a wall surface of the wire drum facing the first wire drum seat; The first guide member is provided with a guide hole, and the guide rod is passed through the guide hole and is loosely matched with the guide hole.

8. The automatic wire clamping device for wire drum according to any one of claims 1 to 4, characterized in that: It also includes: a second wire reel seat, which is located on a side of the wire reel facing away from the first wire reel seat, and the wire reel is rotatably connected to the second wire reel seat.

9. The automatic wire clamping device for a wire drum according to claim 4, characterized in that: The cross section of the fixing plate is in an inverted "L" shape so as to contact the top and the side of the cylinder respectively.

10. A medium-speed wire cutting machine tool, characterized in that: It comprises the automatic wire clamping device for a wire drum as claimed in any one of claims 1 to 8.

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