Automatic clamping transmission chuck for axle numerical control lathe

Abstract

The invention relates to an automatic clamping transmission chuck for an axle numerical control lathe. The automatic clamping transmission chuck comprises a power supply control box, a stop key, a hexagon socket screw I, a travel switch, a copper pin, a spring and a center body, the power supply control box is fixed on one side in the center body; the stop key is arranged on one side of the rear end face of the center body in the radial direction. The inside hexagonal bolt I is mounted on the stop key; axial cylindrical grooves are respectively formed in the upper side and the lower side of the front end of the tip body; the copper pins are respectively and correspondingly connected in the cylindrical grooves in a sliding manner; the spring is axially arranged between the inner end of the copper pin and the cylindrical groove; the travel switches are fixed to the two sides of the interior of the center body, and the signal input ends of the travel switches on the two sides are correspondingly connected with the inner sides of the two copper pins respectively. One-time clamping machining of the axle can be completed, time and labor are saved, the machining efficiency is improved, and the machining quality of the axle can be improved. The problems that traditional clamping wastes time and labor, the coaxiality of secondary clamping is poor, and automatic clamping cannot be achieved are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of numerically controlled lathes, and in particular to an automatic clamping transmission chuck for an axle numerically controlled lathe. Background Art

[0002] The axle is one of the most important parts of locomotives and rail vehicles, and its processing quality is directly related to the driving safety of the locomotive. CNC lathes are necessary equipment for axle processing, and the clamping method of the axle has an important impact on the processing efficiency and quality.

[0003] There are several existing axle processing and clamping methods: 1. After the axle is positioned by the lathe tailstock center, the headstock chuck clamps the axle neck to fix it, and the clamping force drives the axle to rotate. 2. A copper pin is installed on the chuck, and the copper pin is inserted into the threaded hole on the end face of the axle to clamp the axle and drive the axle to rotate.

[0004] The first clamping method has the following disadvantages: because the opening range of the chuck jaws is larger than the axle journal, when the axle is in place, the operator needs to manually adjust the jaw position to clamp the axle journal, which takes a certain amount of time and manpower. The operator needs to manually adjust the three-jaw chuck four times for each axle processing, which has low production efficiency. In addition, the axle diameter is large, the workpiece is long, and the weight is also large. After processing one end of the axle, the axle needs to be turned around to process the other end, which involves secondary clamping. After processing, it is easy to have poor coaxiality, which affects the product processing quality.

[0005] The second clamping method has the following disadvantages: automatic clamping cannot be achieved. During clamping, the operator needs to manually align the copper pin on the chuck with the threaded hole on the end face of the axle one by one. Only after alignment can the tailstock of the CNC lathe be pushed out to complete positioning and clamping. Because the copper pin and the chuck are connected and fixed through the threaded hole, when the copper pin of the chuck and the threaded hole on the end face of the axle are not aligned, it is very easy for the copper pin to damage the end face of the axle and the threaded hole. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide an automatic clamping transmission chuck for an axle CNC lathe, which can complete the axle clamping processing in one time, saving time and labor, improving processing efficiency, and improving the processing quality of the axle.

[0007] The technical solution adopted by the present invention is as follows:

[0008] The present invention proposes an automatic clamping transmission chuck for an axle CNC lathe, comprising a power control box, a stop key, a hexagon socket bolt I, a travel switch, a copper pin, a spring and a top body; the power control box is fixed to one side of the inside of the top body; the stop key is radially arranged on one side of the rear end face of the top body; the hexagon socket bolt I is installed on the stop key; axial cylindrical grooves are respectively opened on the upper and lower sides of the front end of the top body; the copper pins are respectively slidably connected in the cylindrical grooves; the spring is axially arranged between the inner end of the copper pin and the cylindrical groove; the travel switch is fixed on both sides of the inside of the top body, and the signal input ends of the travel switches on both sides are respectively connected to the inner sides of the two copper pins.

[0009] Furthermore, a sealing cover is provided on the outside of the travel switch; the sealing cover is coaxially sleeved on the front side of the top body, and the outer ring of the sealing cover is fixedly connected to the top body by a hexagon socket bolt II.

[0010] Furthermore, a sealing ring I is provided between the outer ring of the sealing cover and the top body.

[0011] Furthermore, a sealing ring II is provided between the inner ring of the sealing cover and the top body.

[0012] Furthermore, the front circumferential surface of the top center body is respectively provided with cylindrical head screws corresponding to the copper pin at right angles; the surface of the copper pin and the cylindrical head screw corresponding to the side is provided with a keyway; the inner end of the cylindrical head screw passes through the top center body and is located inside the keyway; the outer end of the cylindrical head screw is locked with the top center body by a hexagonal nut.

[0013] Furthermore, the power control box is fixedly connected to the top body by screws.

[0014] Furthermore, the housing of the travel switch is fixedly connected to the top body by screws.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention cooperates with a truss manipulator to realize automatic clamping before machining an axle on a CNC lathe or other machining equipment, thereby improving the stability of the axle clamping and thus improving the machining accuracy of the axle.

[0017] 2. The setting of the copper pin spring completely avoids the situation where the copper pin hits the end face of the axle during the advancement of the tailstock due to inaccurate positioning of the copper pin, thereby improving the safety of equipment use, reducing the risk of axle damage and chuck damage, and indirectly reducing equipment maintenance costs.

[0018] 3. The clamping method of the present invention can realize the entire outer cylindrical surface processing of the entire axle in one clamping, which not only avoids the repeated positioning accuracy problem caused by secondary clamping, but also saves the step of turning the axle around for clamping, greatly shortens the processing time and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of an automatic clamping transmission chuck for an axle CNC lathe proposed by the present invention;

[0020] Figure 2 The present invention is a schematic side cross-sectional structural diagram of an automatic clamping transmission chuck for an axle CNC lathe proposed by the present invention.

[0021] Among them, the figure markings are: 1-power control box; 2-stop key; 3-hexagon socket bolt I; 4-travel switch; 5-sealing ring I; 6-hexagon socket bolt II; 7-sealing cover; 8-cylindrical head screw; 9-hexagonal nut; 10-copper pin; 11-spring; 12-sealing ring II; 13-top body. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] It should be noted that, in the description of the present invention, the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0024] See attached Figure 1-2 The present invention proposes an automatic clamping transmission chuck for an axle CNC lathe, comprising a power control box 1 (with a built-in battery), a stop key 2, a hexagon socket bolt 13, a travel switch 4, a copper pin 10, a spring 11 and a top body 13.

[0025] The power control box 1 is fixed to one side of the inside of the top body 13 by screws; a slot is provided at one end of the back of the top body 13, and the slot fits with the stop key 2. The stop key 2 can be installed in the slot accordingly. The stop key 2 is provided with a hexagon socket bolt I3, which is fixed to the hydraulic slider of the spindle of the CNC lathe through the hexagon socket bolt I3. The stop key 2 is driven by the movement of the hydraulic slider to clamp and fix the top body 13; axial cylindrical grooves are respectively provided on the upper and lower sides of the front end of the top body 13; the copper pins 10 are respectively slidably connected to the cylindrical The spring 11 is axially arranged between the inner end of the copper pin 10 and the cylindrical groove; one end of the spring 11 is fixed to the bottom of the cylindrical groove of the top body 13, and the other end is fixed to the inner end of the copper pin 10, which is used to control the extension and retraction of the copper pin 10; the travel switch 4 is fixed to the two sides of the top body 13 by screws, and the signal input ends of the travel switches 4 on both sides correspond to the vertical contact with the inner sides of the copper pins 10 on both sides, which is used to detect whether the copper pins 10 are retracted and put into place; the travel switch 4 is connected to the power control box 1 to supply power to it.

[0026] In this embodiment, a sealing cover 7 is provided on the outside of the travel switch 4; the sealing cover 7 is coaxially sleeved on the front outside of the top body 13, and the outer ring of the sealing cover 7 is fixedly connected to the top body 13 by a hexagon socket bolt II6; and a sealing ring I5 is provided between the outer ring of the sealing cover 7 and the top body 13, and a sealing ring II12 is provided between the inner ring of the sealing cover 7 and the top body 13. The combination of the sealing ring I5, the hexagon socket bolt II6, the sealing cover 7 and the sealing ring II12 can effectively prevent liquid from leaking into the top body 13 and damaging the travel switch 4.

[0027] The front circumferential surface of the top body 13 is respectively provided with cylindrical head screws 8 corresponding to the copper pin 10 at right angles; the surface of the copper pin 10 corresponding to the cylindrical head screw 8 is provided with a keyway; the inner end of the cylindrical head screw 8 passes through the top body 13 and is located inside the keyway; the outer end of the cylindrical head screw 8 is locked with the top body 13 by a hexagonal nut 9. The cylindrical head screw 8 is used in conjunction with the keyway on the copper pin 10 to limit the moving stroke of the copper pin 10 and prevent the copper pin 10 from popping out of the cylindrical groove.

[0028] The working principle of the present invention is as follows: the present invention is fixed on the spindle of a CNC lathe, and the stop key 2 is fixed on the hydraulic slide block of the spindle of the CNC lathe by means of a hexagon socket bolt I3. The stop key 2 is driven by the movement of the hydraulic slide block to clamp and fix the top body 13. When the left end face of the axle contacts the copper pin 10, the spring 11 inside the copper pin 10 is compressed. At this time, the pressure sensor inside the travel switch 4 detects the pressure signal from the copper pin 10. At this time, the copper pin 10 rotates slowly with the spindle of the CNC lathe. When the copper pin 10 detects the process hole on the end face of the axle, the spring rebounds and all the energy is released. The pressure sensor inside the travel switch 4 cannot detect the pressure signal from the copper pin, indicating that the copper pin 10 has entered the process hole on the end face of the axle. One end of the spring 11 is installed on the copper pin 10, and the axis of the copper pin 10 is located on the same straight line as the axis of the spring 11. The signal input end of the travel switch 4 is connected to the copper pin 10. At this time, the pressure sensor transmits the signal to the lathe control system, and the top of the lathe tailstock continues to push out until the axle is fully tightened, completing the automatic clamping of the axle.

[0029] Matters not described in detail in the present invention are known in the art.

[0030] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An automatic clamping transmission chuck for an axle CNC lathe, characterized in that: The chuck includes a power control box, a stop key, a hexagon socket bolt I, a travel switch, a copper pin, a spring and a top body; the power control box is fixed on one side of the inside of the top body; the stop key is radially arranged on one side of the rear end face of the top body; the hexagon socket bolt I is installed on the stop key; axial cylindrical grooves are respectively opened on the upper and lower sides of the front end of the top body; the copper pins are respectively slidably connected in the cylindrical grooves; the spring is axially arranged between the inner end of the copper pin and the cylindrical groove; the travel switches are fixed on both sides of the inside of the top body, and the signal input ends of the travel switches on both sides are respectively connected to the inner sides of the two copper pins.

2. The automatic clamping transmission chuck for an axle CNC lathe according to claim 1 is characterized in that: A sealing cover is arranged outside the travel switch; the sealing cover is coaxially sleeved on the front side of the top body, and the outer ring of the sealing cover is fixedly connected to the top body by a hexagon socket bolt II.

3. The automatic clamping transmission chuck for an axle CNC lathe according to claim 1 is characterized in that: A sealing ring I is arranged between the outer ring of the sealing cover and the top body.

4. The automatic clamping transmission chuck for an axle CNC lathe according to claim 1 is characterized in that: A sealing ring II is arranged between the inner ring of the sealing cover and the top body.

5. The automatic clamping transmission chuck for an axle CNC lathe according to claim 1 is characterized in that: The front circumferential surface of the top center body is respectively provided with cylindrical head screws corresponding to the copper pin at right angles; the surface of the copper pin and the side corresponding to the cylindrical head screw is provided with a keyway; the inner end of the cylindrical head screw passes through the top center body and is located inside the keyway; the outer end of the cylindrical head screw is locked with the top center body by a hexagonal nut.

6. The automatic clamping transmission chuck for an axle CNC lathe according to claim 1, characterized in that: The power control box is fixedly connected to the top body by screws.

7. The automatic clamping transmission chuck for an axle CNC lathe according to claim 1 is characterized in that: The shell of the travel switch is fixedly connected to the top body through screws.

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