Water cooling clamping device for drawing graphite furnace prefabricated rod

Abstract

The utility model discloses a water cooling clamping device of graphite furnace prefabricated rod of wire drawing tower, including three jaw chuck, three jaw chuck includes chuck body and three movable dog, and the chuck body is equipped with cooling runner A, and three movable dog all are cooling runner B, and cooling runner A and cooling runner B all are used for the cooling water of going in cooling chuck body and movable dog and carry out temperature reduction. The present application can effectively prevent the chuck body and movable dog and mutually lock tightly because of the thermal expansion deformation, greatly reduce the stick time, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wire drawing equipment technology, specifically to a water-cooled clamping device for graphite furnace preforms in a wire drawing tower. Background Technology

[0002] The clamping device for the preforms in the wire drawing tower is a key component, its function being to securely and stably fix the preforms, ensuring smooth wire drawing. A three-jaw chuck is a commonly used preform clamping device. These chucks are typically made of metal, and under continuous high-temperature conditions, the metal expands and deforms. Due to the inconsistent deformation of the base and jaws, they become locked together, making disassembly and assembly difficult and resulting in long cooling times during bar changes. The conventional solution is to wait for the clamping device to cool naturally before disassembly and assembly; however, this natural cooling process takes 4-5 hours, severely impacting production efficiency. Utility Model Content

[0003] To solve the above problems, this utility model provides a water-cooled clamping device for graphite furnace preforms in a drawing tower.

[0004] The technical solution adopted in this utility model is:

[0005] A water-cooled clamping device for graphite preforms in a drawing tower includes a three-jaw chuck. The three-jaw chuck includes a chuck body and three movable jaws. The chuck body is provided with a cooling channel A, and each of the three movable jaws is provided with a cooling channel B. Cooling channels A and B are used to introduce cooling water to cool the chuck body and the movable jaws, respectively.

[0006] Furthermore, the cooling channel A includes a first channel, a third channel, and a fifth channel respectively disposed between the three movable jaws and close to the movable jaws, and a second channel and a fourth channel respectively disposed within the circular boss of the chuck body for passing through the preform.

[0007] Three flow channels are set between the three jaws and on the side closest to the jaws. On the one hand, this can increase the density of the cooling flow channels, increase the heat exchange area, and improve the cooling effect. On the other hand, it can uniformly reduce the temperature of the chuck body to prevent local overheating. The circular boss is in direct contact with the preform and heats up quickly and at a high temperature. Setting cooling flow channels in it can effectively reduce its temperature.

[0008] Furthermore, the first, third, and fifth flow channels are all serpentine and distributed within the same chuck body cross-section, while the second and fourth flow channels are also serpentine and distributed within the left and right circumferential walls of the circular boss. This further increases the density of the cooling flow channels and improves the cooling effect.

[0009] Furthermore, the first, second, third, fourth, and fifth flow channels are connected end to end in sequence. The first flow channel extends to the outer circumference of the chuck body to form the cooling water inlet A, and the fifth flow channel extends to the outer circumference of the chuck body to form the cooling water outlet A. The inlet and outlet water structure is simple and easy to control.

[0010] The further cooling channel B includes a sixth and a seventh channel located at the root of the claw, and an eighth channel located at the head of the claw.

[0011] By adopting the above scheme, on the one hand, the density of cooling channels can be increased, the heat exchange area can be increased, and the cooling effect can be improved; on the other hand, the temperature of the chuck can be reduced evenly to prevent local overheating.

[0012] Furthermore, the sixth and seventh flow channels are both straight and are located on the upper and lower sides of the root of the claw, respectively; the eighth flow channel is an inverted U-shape with unequal lengths on both sides. The two ends of the inverted U-shaped cooling flow channel are connected to the sixth and seventh flow channels, respectively. The sixth flow channel extends to the outer side of the claw to form a cooling water inlet B, and the seventh flow channel extends to the outer side of the claw to form a cooling water outlet B.

[0013] By adopting the above scheme, the density of cooling channels can be further increased, thereby improving the cooling effect and simplifying the water outlet structure.

[0014] Furthermore, it also includes a water tank, a circulating pump, an inlet pipe, and a drain pipe. One end of the inlet pipe is connected to the circulating pump, and the other end is connected to the cooling water inlets of cooling channel A and cooling channel B respectively via quick-connect air fittings. One end of the drain pipe is connected to the cooling water outlets of cooling channel A and cooling channel B respectively via quick-connect air fittings, and the other end is connected to the water tank. The water tank is connected to the circulating pump.

[0015] Cooling water can be continuously supplied to the cooling channel through the water tank and circulating pump, improving the cooling effect; and the cooling water can be recycled, reducing the waste of water resources.

[0016] The beneficial effects of this utility model are as follows: by setting cooling channels in the chuck body and jaws to cool the chuck body and movable jaws, the chuck body and movable jaws can be effectively prevented from expanding and deforming due to heat and locking together, which greatly reduces the bar changing time and improves production efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the water-cooled clamping device of this application.

[0018] Figure 2 for Figure 1 Side view.

[0019] Figure 3 for Figure 2 A sectional view along the AA direction.

[0020] Figure 4 This is a front view of the movable chuck.

[0021] Figure 5 This is a side view of the movable chuck.

[0022] Figure 6 for Figure 5 CC-direction sectional view. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and preferred embodiments.

[0024] See Figures 1-6 This application provides a water-cooled clamping device for graphite furnace preforms in a wire drawing tower, including a three-jaw chuck. The three-jaw chuck is a prior art technology. In this embodiment, it includes a chuck body 10, three movable jaws 20, and a drive mechanism (not shown in the figure). The three movable jaws 20 are slidably connected to the chuck body 10 through a slide rail groove 22, and mesh with the planar thread on the back of a disc bevel gear through their root thread 23. The disc bevel gear meshes with a small bevel gear. When the small bevel gear is rotated through the square hole with a wrench, the disc gear rotates, and the planar thread on the back simultaneously drives the three jaws to move closer to or out of the center to clamp workpieces of different diameters.

[0025] The chuck body 10 has a circular boss 11 at its center for the preform to pass through, and the circular boss 11 protrudes away from the jaws. Cooling channels A are provided on the side of the chuck body near the jaws and inside the circular boss 11. Cooling channels A consist of a first channel 101, a third channel 103 and a fifth channel 105 respectively disposed between the three jaws, and a second channel 102 and a fourth channel 104 respectively disposed in the left and right side walls of the circular boss 11.

[0026] The first flow channel 101, the third flow channel 103, and the fifth flow channel 105 have basically the same structure. They all meander from the outer edge of the chuck body to its center in a serpentine shape and are evenly distributed within the same cross-section of the chuck body.

[0027] The second flow channel 102 and the fourth flow channel 104 have basically the same structure. Both meander in a serpentine shape (not shown in the figure) from bottom to top or from top to bottom within the circumferential sidewall of the circular boss 11, and are symmetrically distributed on the left and right sides of the circular boss. That is, assuming that the circular boss is divided into two parts, the second flow channel 102 is located in the left half of the boss, and the fourth flow channel 104 is located in the right half of the boss.

[0028] The first flow channel 101, the second flow channel 102, the third flow channel 103, the fourth flow channel 104, and the fifth flow channel 105 are connected end to end in sequence. The first flow channel 101 extends to the outer circumferential surface of the chuck body to form a cooling water inlet A106, and the fifth flow channel 105 extends to the outer circumferential surface of the chuck body to form a cooling water outlet A107. The cooling water inlet A106 and the cooling water outlet A107 are both located on both sides of the same movable jaw.

[0029] Cooling water enters through cooling water inlet A106, flows sequentially through first flow channel 101, second flow channel 102, third flow channel 103, fourth flow channel 104, and fifth flow channel 105, and flows out through cooling water outlet A107. During this process, the chuck body is cooled.

[0030] The cooling channel B structures in the three movable claws 20 are basically the same, each consisting of a sixth channel 202 and a seventh channel 201 located at the root of the claw, and an eighth channel 203 located at the head of the claw.

[0031] See Figure 6 The sixth flow channel 202 and the seventh flow channel 201 are both straight and are located on the upper and lower sides of the root of the claw, respectively. The eighth flow channel 203 is an inverted U-shape with unequal sides. The longer side is closer to the claw clamping surface. The shorter side of the inverted U-shaped cooling flow channel is connected to the sixth flow channel 202 and the longer side is connected to the seventh flow channel 201. The other end of the sixth flow channel 202 extends to the outer side of the claw to form a cooling water inlet B204, and the other end of the seventh flow channel 201 extends to the outer side of the claw to form a cooling water outlet B205.

[0032] Cooling water enters through cooling water inlet B204, flows through the sixth flow channel 202, the eighth flow channel 203 and the seventh flow channel 201 in sequence, and exits through cooling water outlet B205. During this process, the movable claw 20 is cooled.

[0033] In another embodiment of the present invention, a cooling water circulation device (not shown in the figure) is also included. The cooling water circulation device includes a water tank, a circulation pump, four inlet pipes and four drain pipes. One end of each of the four inlet pipes is connected to the outlet of the circulation pump, and the other end is connected to the cooling water inlet A106 of the chuck body and the cooling water inlet B204 of the three movable jaws respectively through an air quick connector. One end of each of the four drain pipes is connected to the cooling water outlet A107 of the chuck body and the cooling water outlet B205 of the three movable jaws respectively through an air quick connector, and the other end is connected to the water tank. The water tank is connected to the circulation pump.

[0034] Practice shows that when using a traditional three-jaw chuck, after the wire drawing furnace and preform are fully heated, the surface temperature of the central area of ​​the clamping device can reach 135°C; when using the water-cooled clamping device of this application, the surface temperature of the central area of ​​the clamping device is 27°C.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also within the protection scope of the present utility model.

Claims

1. A water-cooled clamping device for graphite furnace preforms in a drawing tower, comprising a three-jaw chuck, characterized in that, The three-jaw chuck includes a chuck body and three movable jaws. The chuck body is provided with a cooling channel A, and each of the three movable jaws is provided with a cooling channel B. Cooling channels A and B are used to introduce cooling water to cool the chuck body and the movable jaws.

2. The water-cooled clamping device according to claim 1, characterized in that, Cooling channel A includes a first channel, a third channel, and a fifth channel respectively disposed between the three movable jaws and close to the movable jaws, and a second channel and a fourth channel respectively disposed within the circular boss of the chuck body for passing through the preform.

3. The water-cooled clamping device according to claim 2, characterized in that, The first, third, and fifth flow channels are all serpentine and distributed within the same chuck body cross-section. The second and fourth flow channels are also serpentine and distributed within the left and right circumferential walls of the circular boss.

4. The water-cooled clamping device according to claim 3, characterized in that, The first flow channel, the second flow channel, the third flow channel, the fourth flow channel, and the fifth flow channel are connected end to end in sequence. The first flow channel extends to the outer circumference of the chuck body to form the cooling water inlet A, and the fifth flow channel extends to the outer circumference of the chuck body to form the cooling water outlet A.

5. The water-cooled clamping device according to claim 1, characterized in that, Cooling channel B includes a sixth and a seventh channel located at the root of the claw, and an eighth channel located at the head of the claw.

6. The water-cooled clamping device according to claim 1, characterized in that, The sixth and seventh flow channels are both straight and are located on the upper and lower sides of the root of the claw, respectively. The eighth flow channel is an inverted U-shape with unequal lengths on both sides. The two ends of the inverted U-shaped cooling flow channel are connected to the sixth and seventh flow channels, respectively. The sixth flow channel extends to the outer side of the claw to form a cooling water inlet B, and the seventh flow channel extends to the outer side of the claw to form a cooling water outlet B.

7. The water-cooled clamping device according to claim 1, characterized in that, It also includes a water tank, a circulating pump, an inlet pipe, and a drain pipe. One end of the inlet pipe is connected to the circulating pump, and the other end is connected to the cooling water inlets of cooling channel A and cooling channel B respectively via quick-connect air fittings. One end of the drain pipe is connected to the cooling water outlets of cooling channel A and cooling channel B respectively via quick-connect air fittings, and the other end is connected to the water tank. The water tank is connected to the circulating pump.

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