Copper switch piece contact arm and numerical control lathe

Abstract

The invention relates to the technical field of numerical control lathes, and discloses a copper switch piece contact arm and a numerical control lathe, the copper switch piece contact arm comprises a lathe main body, a three-jaw chuck is arranged in the lathe main body, a positioning groove is formed in the three-jaw chuck, a cutter is slidably connected in the lathe main body, an air suction device is arranged in the positioning groove, and an elastic block is arranged in the three-jaw chuck; a first conducting strip is arranged in the three-jaw chuck, a second conducting strip is arranged on the elastic block, and the second conducting strip is electrically connected to the air suction device. The elastic block can drive the second conducting strip to abut against the first conducting strip so that a circuit of the air suction device can be closed and powered on, and air in the positioning groove can be rapidly pumped out through the air suction device; the three-jaw chuck is provided with the positioning groove, so that a negative-pressure vacuum state between the workpiece and the positioning groove is realized, the workpiece can be stably fixed on the groove wall of the positioning groove, the condition that the workpiece shifts or is not completely inserted in place in the machining process is effectively prevented, the position accuracy of the workpiece inserted into the three-jaw chuck is improved, and the size consistency and the machining qualification rate of the workpiece are further improved.

Description

Technical Field

[0001] This application relates to the technical field of CNC lathes, and in particular to a copper switch contact arm and a CNC lathe. Background Technology

[0002] A CNC lathe is a high-precision, high-efficiency automated machine tool used for turning. It is widely used in the field of mechanical manufacturing. It achieves automated processing through digital control technology. The CNC system can precisely control the movement of various parts of the machine tool, ensuring the dimensional and shape accuracy of the machined parts. It can process various shaft, disc, and sleeve parts, such as copper switch contact arms.

[0003] In related technologies, a CNC lathe includes a lathe body, a three-jaw chuck for fixing workpieces is provided inside the lathe body, a positioning groove for inserting workpieces is provided on the three-jaw chuck, and a cutting tool for cutting workpieces is slidably connected inside the lathe body.

[0004] In the current process, the loading and positioning of workpieces mainly rely on manual operation by workers. Due to the lack of precise depth control and feedback, when workers insert one end of the workpiece into the positioning slot of the three-jaw chuck, there may be cases where the workpiece is not fully inserted. This randomness of manual operation leads to deviations in the length of the workpiece extending out of the positioning slot, causing the subsequent tool to deviate from the overall cutting position, affecting the consistency of workpiece dimensions and the processing qualification rate. Summary of the Invention

[0005] To improve the positioning accuracy of workpieces inserted into a three-jaw chuck, this application provides a copper switch contact arm and a CNC lathe.

[0006] This application provides a copper switch contact arm and a CNC lathe, which adopts the following technical solution: A copper switch contact arm includes a lathe body, a three-jaw chuck for fixing a workpiece inside the lathe body, a positioning groove for inserting the workpiece on the three-jaw chuck, a cutting tool for cutting the workpiece slidably connected inside the lathe body, an air suction device for absorbing air in the positioning groove, a spring block inside the three-jaw chuck located on the movement path of the workpiece inserted into the positioning groove, a first conductive plate inside the three-jaw chuck, and a second conductive plate on the spring block, the second conductive plate being electrically connected to the air suction device; when the workpiece is inserted into the positioning groove, the spring block drives the second conductive plate to abut against the first conductive plate, the air suction device is activated, and the workpiece is vacuum-adsorbed into the positioning groove.

[0007] By adopting the above technical solution, when the workpiece is inserted into the positioning groove, the spring block is located on the moving path of the workpiece insertion into the positioning groove, so that the spring block can drive the second conductive plate to abut against the first conductive plate, thereby realizing the circuit closure and energization of the suction device. The suction device quickly extracts the air in the positioning groove to achieve a negative pressure vacuum state between the workpiece and the positioning groove, so that the workpiece can be stably fixed on the groove wall of the positioning groove, effectively preventing the workpiece from shifting or not being fully inserted during the processing, thereby improving the positional accuracy of the workpiece inserted into the three-jaw chuck, and further improving the consistency of workpiece size and the processing qualification rate.

[0008] Optionally, a turntable is rotatably connected to the three-jaw chuck, and the first conductive plate is disposed on the turntable; when the turntable rotates, the first conductive plate disengages from the second conductive plate, and the air suction device is shut off.

[0009] By adopting the above technical solution, when the operator needs to remove the workpiece from the three-jaw chuck, the operator can rotate the turntable to make the first conductive plate detach from the second conductive plate, thereby cutting off the power supply circuit of the suction device, allowing the suction device to stop suction, and restoring the positioning slot to a normal pressure state. The operator can then easily pull the workpiece out of the positioning slot, effectively improving the efficiency and ease of operation of workpiece replacement.

[0010] Optionally, the turntable is provided with an air intake channel, and the three-jaw chuck is provided with a vent hole that connects to the positioning groove; when the first conductive sheet is disengaged from the second conductive sheet, the air intake channel and the vent hole are connected.

[0011] By adopting the above technical solution, the operator rotates the turntable to drive the first conductive sheet to detach from the second conductive sheet, cuts off the circuit to shut off the suction device, and at the same time, the air intake channel is connected to the vent hole, allowing external air to enter the vent hole, so that the vacuum state between the workpiece and the positioning groove can be quickly released, thereby making the workpiece lose its adsorption force with the positioning groove, so that the operator can take the workpiece out of the positioning groove.

[0012] Optionally, the three-jaw chuck is provided with an air blowing device for blowing out debris, and the three-jaw chuck has an air blowing channel communicating with the air blowing device.

[0013] By adopting the above technical solution, the three-jaw chuck is equipped with an air blowing device for blowing out the chips. This air blowing device can blow away the attached or retained machining chips in the three-jaw chuck, reducing the possibility of chips remaining in the three-jaw chuck. This prevents residual chips from scratching or abrading the workpiece surface during subsequent clamping, and further ensures the surface smoothness and machining quality of the workpiece.

[0014] Optionally, the air blowing device is electrically connected to the second conductive plate; when the first conductive plate abuts against the second conductive plate, the air blowing device is activated.

[0015] By adopting the above technical solution, when the first conductive sheet abuts against the second conductive sheet, the air blowing device is electrically connected to the second conductive sheet, so that the air blowing device can be activated when the workpiece is inserted into the positioning groove. The operator does not need to turn on the air blowing device separately, reducing the number of operation steps required by the operator. At the same time, by activating the air blowing device, the operator can sense in real time that the workpiece is installed in place, which provides convenience for the operator in the process of installing the workpiece.

[0016] Optionally, the turntable is provided with an elastic component, which is used to drive the turntable to achieve a reset; when the air intake channel is connected to the vent, the elastic component is in a deformed state.

[0017] By adopting the above technical solution, the turntable is equipped with an elastic component for driving the turntable to achieve reset. When the operator needs to disassemble the workpiece, he first rotates the turntable to disconnect the suction device and the blowing device, and allows air to circulate into the positioning groove. The operator can then disassemble the workpiece from the positioning groove. Then, the turntable is driven to rotate by the elastic component, so that the turntable can achieve automatic reset.

[0018] Optionally, the spring block is provided with a guide slope, and the distance from the guide slope to the axis of the three-jaw chuck gradually decreases along the direction in which the workpiece is inserted into the positioning groove. The guide slope is used to guide the spring block to move away from the workpiece.

[0019] By adopting the above technical solution, the distance from the guide slope to the axis of the three-jaw chuck gradually decreases along the direction of the workpiece insertion into the positioning groove. The guide slope can play a guiding role, so that the spring block can move more smoothly along the inclined direction of the guide slope in a direction away from the workpiece, effectively avoiding the spring block jamming or uneven wear.

[0020] Secondly, the copper switch contact arm provided in this application adopts the following technical solution: A copper switch contact arm, formed by a CNC lathe according to any one of claims 1-7, includes a contact arm body, the two ends of the contact arm body being a connecting end and a fixed end, the diameter of the connecting end being smaller than the diameter of the fixed end, a guide angle being formed on the end face of the connecting end, and the distance from the guide angle to the axis of the contact arm body gradually increasing along the direction from the connecting end to the fixed end.

[0021] By adopting the above technical solution, the distance from the guide angle to the axis of the contact arm body gradually increases along the direction of the connection end closer to the fixed end, so that the end face of the connection port forms a guide arc surface. This allows for a slight offset during the initial process of the contact arm body being inserted into the corresponding sleeve, automatically guiding the contact arm body to slide into the correct position, facilitating the alignment of the contact arm body and the corresponding sleeve, while reducing sharp corners and protecting the workers' hands from cuts.

[0022] Optionally, the surface of the contact arm body is coated with an insulating material.

[0023] By adopting the above technical solution, an insulating material is sprayed onto the surface of the contact arm body, so that the surface of the contact arm body is covered with a layer of insulating material, which effectively extends the creepage distance from the metal surface to the grounding part, improves the surface insulation strength, and reduces partial discharge. The insulating coating completely isolates the contact arm body from air and moisture, effectively reducing the occurrence of corrosion on the contact arm and ensuring the conductivity and long-term stability of the contact arm surface.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. When the workpiece is inserted into the positioning slot, the spring block is positioned on the moving path of the workpiece insertion into the positioning slot, enabling the spring block to drive the second conductive plate to abut against the first conductive plate, thereby closing and energizing the circuit of the suction device. The suction device quickly extracts the air from the positioning slot, achieving a negative pressure vacuum state between the workpiece and the positioning slot. This allows the workpiece to be stably fixed on the slot wall, effectively preventing the workpiece from shifting or not being fully inserted during processing. This improves the positional accuracy of the workpiece when inserted into the three-jaw chuck, further enhancing the consistency of workpiece dimensions and the processing qualification rate.

[0025] 2. When the operator needs to remove the workpiece from the three-jaw chuck, the operator rotates the turntable to detach the first conductive plate from the second conductive plate, thereby cutting off the power supply circuit of the suction device, allowing the suction device to stop suction, and restoring the positioning slot to a normal pressure state. The operator can then easily pull the workpiece out of the positioning slot, effectively improving the efficiency and ease of operation of workpiece replacement. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a structural schematic diagram of an embodiment of this application; Figure 3 This is an embodiment of the present application. Figure 2 A partial sectional view along line AA; Figure 4 This is a partial exploded view of the air intake passage in an embodiment of this application.

[0027] Reference numerals: 1. Lathe body; 11. Cutting tool; 2. Three-jaw chuck; 21. Positioning groove; 211. Air intake device; 212. Through hole; 213. Vent hole; 22. Spring block; 221. Guide slope; 222. Second conductive plate; 23. Air blowing device; 231. Air blowing channel; 3. Turntable; 31. First conductive plate; 32. Air intake channel; 33. Elastic component; 4. Contact arm body; 41. Connecting end; 411. Guide angle; 42. Fixed end. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0029] This embodiment discloses a copper switch contact arm, which is machined using a CNC lathe, with reference to... Figure 1 A copper switch contact arm includes a contact arm body 4, with a connecting end 41 and a fixed end 42 at its two ends along its length. The diameter of the connecting end 41 is smaller than the diameter of the fixed end 42. A guide angle 411 is formed on the end face of the connecting end 41 away from the fixed end 42. The distance from the guide angle 411 to the axis of the contact arm body 4 gradually increases along the direction of the connecting end 41 towards the fixed end 42. The guide angle 411 is used to guide the contact arm body 4 to be inserted more smoothly into the corresponding sleeve. An insulating material is sprayed on the surface of the contact arm body 4 to improve its insulation.

[0030] This embodiment discloses a CNC lathe, referring to... Figure 2 and Figure 3 A CNC lathe includes a lathe body 1, within which a three-jaw chuck 2 for fixing a workpiece is fixedly connected. The three-jaw chuck 2 has a positioning groove 21 in its center for inserting the end of the workpiece. A cutting tool 11 for cutting the workpiece is slidably connected within the lathe body 1. An air suction device 211 is fixedly connected to the bottom wall of the positioning groove 21 for suctioning air from the positioning groove 21. A spring block 22, L-shaped, is fixedly connected within the three-jaw chuck 2. A through hole 212 for the spring block 22 to extend from the groove wall of the positioning groove 21. The spring block 22 deforms towards the axis of the positioning groove 21, and is positioned on the movement path of the workpiece inserted into the positioning groove 21.

[0031] Reference Figure 3A guide slope 221 is formed on the surface of the spring block 22 near the positioning groove 21. The distance from the guide slope 221 to the axis of the positioning groove 21 gradually decreases along the direction in which the workpiece is inserted into the positioning groove 21. The spring block 22 can move away from the workpiece along the inclined direction of the guide slope 221. A first conductive plate 31 is fixedly connected inside the three-jaw chuck 2. A second conductive plate 222 is fixedly connected to the end face of the spring block 22 away from the positioning groove 21. The second conductive plate 222 is electrically connected to the suction device 211. When the workpiece is inserted into the positioning groove 21, the workpiece drives the spring block 22 to exit the positioning groove 21 through the guide slope 221. The spring block 22 drives the second conductive plate 222 to abut against the first conductive plate 31. The suction device 211 achieves circuit connection, and the workpiece can be vacuum-adsorbed onto the bottom wall of the positioning groove 21.

[0032] Reference Figure 3 and Figure 4 A turntable 3 is rotatably connected to the outer surface of the three-jaw chuck 2, and a first conductive plate 31 is fixedly connected to the turntable 3. An air intake channel 32 communicating with external air is provided on the turntable 3. The air intake channel 32 and the first conductive plate 31 are located on different radial directions of the turntable 3. A vent hole 213 communicating with the positioning groove 21 is provided on the three-jaw chuck 2. When the operator needs to disassemble the workpiece, the operator rotates the turntable 3, causing the first conductive plate 31 to detach from the second conductive plate 222. The suction device 211 is then de-energized and shut off. At this time, the air intake channel 32 communicates with the vent hole 213, allowing external air to enter the positioning groove 21 along the air intake channel 32 and the vent hole 213, thus releasing the vacuum suction state between the workpiece and the positioning groove 21, allowing the operator to smoothly remove the workpiece from the positioning groove 21.

[0033] Reference Figure 3 An air blowing device 23 for blowing out debris is fixedly connected inside the three-jaw chuck 2. The air blowing device 23 is electrically connected to the second conductive plate 222, and an air blowing channel 231 communicating with the air blowing device 23 is opened inside the three-jaw chuck 2. When the workpiece is inserted into the positioning slot 21, the first conductive plate 31 abuts against the second conductive plate 222, and the air blowing device 23 is turned on, thus blowing out the debris inside the three-jaw chuck 2. At the same time, the operator can clearly know that the workpiece has been fully inserted by sensing the opening of the air blowing device 23, reducing the occurrence of workpieces not being fully inserted.

[0034] Reference Figure 3 and Figure 4 An elastic component 33 is fixedly connected to the end face of the turntable 3 away from the tool 11. The elastic component 33 is used to drive the turntable 3 to achieve reset. When the operator needs to disassemble the workpiece, the operator rotates the turntable 3 to connect the air intake channel 32 and the vent 213. At this time, the elastic component 33 is in a deformed state, and the turntable 3 can achieve automatic reset.

[0035] The implementation principle of the copper switch contact arm and CNC lathe in this application embodiment is as follows: The operator inserts the workpiece into the positioning groove 21, and the workpiece driving spring 22 moves away from the positioning groove 21, so that the first conductive sheet 31 abuts against the second conductive sheet 222. The suction device 211 and the blowing device 23 are activated. The operator can know that the workpiece has been installed in place by sensing the blowing device 23. The suction device 211 realizes a vacuum state between the workpiece and the positioning groove 21, so as to firmly adsorb the workpiece in the positioning groove 21.

[0036] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0037] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A CNC lathe, comprising a lathe body (1), wherein a three-jaw chuck (2) for fixing a workpiece is provided inside the lathe body (1), and a positioning groove (21) for inserting the workpiece is provided on the three-jaw chuck (2), and a cutting tool (11) for cutting the workpiece is slidably connected inside the lathe body (1), characterized in that: The positioning groove (21) is equipped with an air suction device (211) for adsorbing air in the positioning groove (21). The three-jaw chuck (2) is equipped with a spring block (22). The spring block (22) is located on the moving path of the workpiece inserted into the positioning groove (21). The three-jaw chuck (2) is equipped with a first conductive sheet (31). The spring block (22) is equipped with a second conductive sheet (222). The second conductive sheet (222) is electrically connected to the air suction device (211). When the workpiece is inserted into the positioning groove (21), the spring block (22) drives the second conductive sheet (222) to abut against the first conductive sheet (31). The air suction device (211) is activated, and the workpiece is vacuum adsorbed in the positioning groove (21).

2. A CNC lathe according to claim 1, characterized in that: A turntable (3) is rotatably connected to the three-jaw chuck (2), and the first conductive plate (31) is disposed on the turntable (3). When the turntable (3) rotates, the first conductive plate (31) disengages from the second conductive plate (222), and the air suction device (211) is turned off.

3. A CNC lathe according to claim 2, characterized in that: The turntable (3) is provided with an air intake channel (32), and the three-jaw chuck (2) is provided with a vent hole (213) that connects to the positioning groove (21); when the first conductive sheet (31) is disengaged from the second conductive sheet (222), the air intake channel (32) connects with the vent hole (213).

4. A CNC lathe according to claim 1, characterized in that: The three-jaw chuck (2) is provided with an air blowing device (23) for blowing out debris, and the three-jaw chuck (2) is provided with an air blowing channel (231) that communicates with the air blowing device (23).

5. A CNC lathe according to claim 4, characterized in that: The air blowing device (23) is electrically connected to the second conductive plate (222); when the first conductive plate (31) abuts against the second conductive plate (222), the air blowing device (23) is activated.

6. A CNC lathe according to claim 3, characterized in that: The turntable (3) is provided with an elastic component (33), which is used to drive the turntable (3) to achieve reset; when the air intake channel (32) is connected to the vent (213), the elastic component (33) is in a deformed state.

7. A CNC lathe according to claim 1, characterized in that: The spring block (22) is provided with a guide slope (221). The distance from the guide slope (221) to the axis of the three-jaw chuck (2) gradually decreases along the direction of the workpiece insertion positioning groove (21). The guide slope (221) is used to guide the spring block (22) to move away from the workpiece.

8. A copper switch contact arm, characterized in that: The contact arm body (4) is formed by machining on a CNC lathe according to any one of claims 1-7. The two ends of the contact arm body (4) are a connecting end (41) and a fixed end (42), respectively. The diameter of the connecting end (41) is smaller than the diameter of the fixed end (42). A guide angle (411) is provided on the end face of the connecting end (41). The distance from the guide angle (411) to the axis of the contact arm body (4) gradually increases along the direction from the connecting end (41) to the fixed end (42).

9. A copper switch contact arm according to claim 8, characterized in that: The surface of the contact arm body (4) is coated with insulating material.

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