Cutting wire traction mechanism with a buffer structure

Abstract

The utility model provides a cutting silk traction mechanism with buffer structure, it includes traction drive wheel, traction pressure wheel, pressure piston rod, pressure cylinder and buffer spring, this cutting silk traction mechanism sets up buffer spring, applies buffer spring force to the telescopic process of pressure piston rod, and then applies buffer spring force to the clamping process of traction pressure wheel and traction drive wheel to cutting silk, avoids the damage of too big clamping force to cutting silk, can also reduce the influence of the impact force of sudden clamping or loosening to the mechanism itself, improves the stability and reliability of mechanism operation, and the guide cylinder shell with the matching wedge angle extends into the gap between the drive wheel and the pressure wheel, and the cutting silk is limited in multiple directions by the matching wedge angle, the traction drive wheel and the traction pressure wheel, preventing deviation or wire jumping, further ensuring the stability of the cutting silk in the traction process.

Description

Technical Field

[0001] This utility model relates to wire electrical discharge machining equipment, and more particularly to a wire traction mechanism with a buffer structure. Background Technology

[0002] Patent document CN102357692B discloses a constant tension wire feeding mechanism with automatic wire threading function. It includes a wire feeding and take-up device, a tension adjustment device, and an automatic wire threading device. A first-stage tension adjustment device and a second-stage tension adjustment device are installed between the wire feeding and take-up device and the automatic wire threading device. The automatic wire threading mechanism enables automatic wire cutting and threading, and automatic recovery of broken and waste wires. It is convenient to operate, saves time and labor, improves wire threading efficiency and production efficiency, and enhances wire threading quality. The first-stage and second-stage tension adjustment devices achieve two-stage tension control and effectively control the changes in the tension of the preceding wire roll, ensuring constant tension of the metal wire and improving the machining accuracy of the parts. However, the wire feeding wheel and wire feeding clamping wheel in the automatic wire threading mechanism use a cylinder to apply clamping force during clamping. The high speed during clamping can easily cause squeezing damage to the cutting wire, shortening its service life. Therefore, it is necessary to optimize its structure to overcome the above-mentioned defects. Utility Model Content

[0003] The purpose of this invention is to provide a cutting wire traction mechanism with a buffer structure to avoid the pressure wheel causing squeezing damage to the cutting wire.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A wire traction mechanism with a buffer structure includes:

[0006] A traction drive wheel is located on one side of the cutting wire conveying path and is connected to a power mechanism, which drives the traction drive wheel to rotate.

[0007] The traction clamping wheel is located on the other side of the cutting wire movement path. Its outer wall abuts against the outer wall of the traction drive wheel, clamping the cutting wire between the traction clamping wheel and the traction drive wheel. When the traction drive wheel rotates, it drives the traction clamping wheel to rotate together and drives the cutting wire to move.

[0008] A clamping piston rod is connected to a traction clamping wheel via a rotating structure, and the traction clamping wheel can rotate on the clamping piston rod.

[0009] A pressing cylinder is connected to an air supply mechanism via a pipeline. A pressing piston rod is installed inside the pressing cylinder. The air supply mechanism drives the pressing piston rod to extend and retract within the pressing cylinder. The pressing piston rod also drives the traction pressing wheel to move closer to or away from the traction drive wheel.

[0010] Also includes:

[0011] A buffer spring is located in the cylinder of the clamping device. One end of the buffer spring abuts against the clamping piston rod, and the other end abuts against the clamping cylinder. The buffer spring applies a buffering force to the extension and retraction process of the clamping piston rod, and in turn applies a buffering force to the clamping process of the traction clamping wheel and the traction drive wheel on the cutting wire.

[0012] In one embodiment of this utility model, the pressing cylinder adopts a single-acting cylinder structure, and has a common air inlet and outlet hole inside. The pressing cylinder is connected to the air supply device through the common air inlet and outlet hole, and a buffer spring applies a buffering force to the retraction process of the pressing piston rod.

[0013] In one embodiment of this utility model, the pressing cylinder adopts a double-acting cylinder structure, which has an air inlet and an air outlet. The pressing cylinder is connected to the air supply device through the air inlet and the air outlet, and a buffer spring applies a buffering force to the extension process of the pressing piston rod.

[0014] In one embodiment of this utility model, a limiting retaining ring is provided at the piston chamber outlet of the pressing cylinder, the pressing piston rod extends out from the limiting retaining ring, and a buffer spring is sleeved on the pressing piston rod, with one end abutting against the piston rod and the other end abutting against the limiting retaining ring.

[0015] In one embodiment of this utility model, the above-mentioned cutting wire traction mechanism further includes:

[0016] The support frame is installed in the wire cutting equipment and has an assembly space inside. The traction drive wheel is connected to the traction motor through the transmission spindle. The traction motor and the clamping cylinder are installed in the support frame, and the support frame supports and positions the traction motor and the clamping cylinder.

[0017] In one embodiment of this utility model, the above-mentioned cutting wire traction mechanism further includes:

[0018] The guide shell is provided in pairs, each of which is installed in the bearing frame. Its axial direction extends along the cutting wire conveying path, and its inner end extends into the gap between the traction drive wheel and the traction clamping wheel. The cutting wire can pass through the guide shell, and the guide shell guides the conveying process of the cutting wire.

[0019] In one embodiment of this utility model, each guide cylinder shell has a mating wedge at its inner end. The mating wedge is adapted to the shape of the traction drive wheel and the traction clamping wheel, and extends into the gap between the traction drive wheel and the traction clamping wheel. The mating wedge, the traction drive wheel and the traction clamping wheel limit the cutting wire.

[0020] The advantages of this utility model are:

[0021] This wire cutting traction mechanism incorporates a buffer spring to apply a buffering force during the extension and retraction of the pressing piston rod. This buffering force, in turn, applies a buffering force to the clamping process of the traction pressing wheel and traction drive wheel on the wire cutting, preventing excessive clamping force from damaging the wire cutting. It also reduces the impact of sudden clamping or loosening on the mechanism itself, improving the stability and reliability of the mechanism's operation. A guide cylinder shell with a mating wedge extends into the gap between the drive wheel and the pressing wheel. The mating wedge, traction drive wheel, and traction pressing wheel provide multi-directional limiting for the wire cutting, preventing deviation or wire skipping, and further ensuring the stability of the wire cutting during the traction process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the cutting wire traction mechanism with a buffer structure proposed in this utility model;

[0023] Figure 2 This is an exploded view of the cutting wire traction mechanism. Detailed Implementation

[0024] 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, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] like Figure 1 , Figure 2As shown, the wire traction mechanism with a buffer structure proposed in this utility model includes a traction drive wheel 100, a traction clamping wheel 200, a clamping piston rod 300, a clamping cylinder 400, and a buffer spring 500. The traction drive wheel is located on one side of the wire conveying path and is connected to the power mechanism, which drives the traction drive wheel to rotate. The traction clamping wheel is located on the other side of the wire movement path, and its outer wall abuts against the outer wall of the traction drive wheel, clamping the wire between the traction clamping wheel and the traction drive wheel. When the traction drive wheel rotates, it drives the traction clamping wheel to rotate together, and drives the wire to move, clamping the piston rod. The traction clamping wheel is connected to the traction clamping wheel via a rotating structure. The clamping cylinder is connected to the air supply mechanism via a pipeline. The clamping piston rod is installed inside the clamping cylinder. The air supply mechanism drives the clamping piston rod to extend and retract within the clamping cylinder, which in turn moves the traction clamping wheel closer to or away from the traction drive wheel. A buffer spring is located within the clamping cylinder, with one end abutting against the clamping piston rod and the other end abutting against the clamping cylinder. The buffer spring applies a buffering force to the extension and retraction of the clamping piston rod, thereby applying a buffering force to the clamping process of the traction clamping wheel and the traction drive wheel on the cutting wire. In this embodiment, a transmission gear is also provided between the traction drive wheel and the traction clamping wheel. The transmission gear allows for synchronous rotation, preventing damage to the cutting wire due to asynchronous rotation.

[0026] In one embodiment, the pressing cylinder adopts a single-acting cylinder structure, which has a common inlet and outlet port inside. The pressing cylinder is connected to the air supply device through the common inlet and outlet port, and a buffer spring applies a buffering force to the retraction process of the pressing piston rod.

[0027] In another embodiment, the pressing cylinder adopts a double-acting cylinder structure, which has an air inlet and an air outlet. The pressing cylinder is connected to the air supply device through the air inlet and the air outlet, and a buffer spring applies a buffering force to the extension process of the pressing piston rod.

[0028] In this embodiment, a limiting retaining ring 510 is provided at the piston chamber outlet of the pressing cylinder, the pressing piston rod extends out from the limiting retaining ring, and a buffer spring is sleeved on the pressing piston rod, with one end abutting against the piston rod and the other end abutting against the limiting retaining ring.

[0029] In this embodiment, the above-mentioned wire cutting traction mechanism also includes a support frame 600, which is installed in the wire cutting equipment and has an assembly space inside. The traction drive wheel is connected to the traction motor 110 through a transmission spindle. The traction motor and the clamping cylinder are installed in the support frame, and the support frame supports and positions the traction motor and the clamping cylinder.

[0030] In this embodiment, the above-mentioned wire cutting traction mechanism further includes a guide cylinder shell 700. A pair of guide cylinder shells are provided, each installed in the supporting frame. The guide cylinder shell extends axially along the wire cutting path, and its inner end extends into the gap between the traction drive wheel and the traction clamping wheel. The wire cutting can pass through the guide cylinder shell, and the guide cylinder shell guides the wire cutting during the feeding process. Simultaneously, a gap is left between the guide cylinder shells, allowing the wire cutting to protrude from the joint of the guide cylinder shell and be clamped between the traction clamping wheel and the traction drive wheel.

[0031] In this embodiment, each guide cylinder shell has a mating wedge angle 710 at its inner end. The mating wedge angle is adapted to the shape of the traction drive wheel and the traction clamping wheel, and extends into the gap between the traction drive wheel and the traction clamping wheel. The mating wedge angle, the traction drive wheel and the traction clamping wheel limit the cutting wire.

[0032] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A wire traction mechanism with a buffer structure, characterized in that, include: A traction drive wheel is located on one side of the cutting wire conveying path and is connected to a power mechanism, which drives the traction drive wheel to rotate. The traction clamping wheel is located on the other side of the cutting wire movement path. Its outer wall abuts against the outer wall of the traction drive wheel, clamping the cutting wire between the traction clamping wheel and the traction drive wheel. When the traction drive wheel rotates, it drives the traction clamping wheel to rotate together and moves the cutting wire. A clamping piston rod is connected to a traction clamping wheel via a rotating structure, and the traction clamping wheel can rotate on the clamping piston rod. A pressing cylinder is connected to an air supply mechanism via a pipeline. A pressing piston rod is installed inside the pressing cylinder. The air supply mechanism drives the pressing piston rod to extend and retract within the pressing cylinder. The pressing piston rod also drives the traction pressing wheel to move closer to or away from the traction drive wheel. Its characteristic is that it further includes: A buffer spring is located in the cylinder of the clamping device, with one end abutting against the clamping piston rod and the other end abutting against the clamping cylinder.

2. The cutting wire traction mechanism with a buffer structure according to claim 1, characterized in that: The clamping cylinder adopts a single-acting cylinder structure, and its interior is equipped with a common inlet and outlet port. The clamping cylinder is connected to the air supply equipment through the common inlet and outlet port.

3. The wire traction mechanism with a buffer structure according to claim 1, characterized in that: The pressing cylinder adopts a double-acting cylinder structure, which has an air inlet and an air outlet. The pressing cylinder is connected to the air supply equipment through the air inlet and air outlet.

4. The cutting wire traction mechanism with a buffer structure according to claim 1, characterized in that: A limiting ring is provided at the piston chamber outlet of the pressing cylinder. The pressing piston rod extends out from the limiting ring, and a buffer spring is sleeved on the pressing piston rod, with one end abutting against the piston rod and the other end abutting against the limiting ring.

5. A wire traction mechanism with a buffer structure according to claim 1, characterized in that, Also includes: The support frame is installed in the wire cutting equipment and has an assembly space inside. The traction drive wheel is connected to the traction motor through the transmission spindle. The traction motor and the clamping cylinder are installed in the support frame.

6. The cutting wire traction mechanism with a buffer structure according to claim 5, characterized in that, Also includes: A pair of guide cylinder shells are provided, each of which is installed in the bearing frame. The guide cylinder shell extends axially along the cutting wire conveying path and extends its inner end into the gap between the traction drive wheel and the traction clamping wheel. The cutting wire can pass through the guide cylinder shell.

7. A wire traction mechanism with a buffer structure according to claim 6, characterized in that: Each guide cylinder shell has a mating wedge at its inner end. The mating wedge is adapted to the shape of the traction drive wheel and the traction clamping wheel and extends into the gap between the traction drive wheel and the traction clamping wheel.

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