An automatic feeding clamp and a double-spindle CNC machining device

Abstract

The utility model provides a kind of automatic feeding clamp and double-spindle CNC machining equipment, and automatic feeding clamp includes cylinder clamp cover and cylinder clamp, the one end of cylinder clamp away from pedestal is equipped with inverted conical structure, the one end of central hole away from pedestal is equipped with conical opening, the cylinder clamp can be driven by a drive component and be displaced relative to the cylinder clamp cover, so that the inverted conical structure of the cylinder clamp is extruded by the conical inner surface of the conical opening and the workpiece is clamped.Taking advantage of the inclined plane force-increasing principle, the smaller axial tension of the piston cylinder structure can be converted into larger clamping force of the cylinder clamp, thereby achieving effective clamping of the workpiece. The clamping structure can cooperate with the automation system, enabling automatic clamping of the workpiece, significantly improving the operation speed, avoiding uneven clamping effect caused by skill differences, unmanned clamping operation also improves the safety of personnel, thereby improving the overall production capacity.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to an automatic feeding fixture and a dual-spindle CNC machining equipment. Background Technology

[0002] In conventional machining equipment, such as CNC machining equipment, clamps are needed to hold the workpiece. Currently, when machining bar stock, manual labor is required to place each bar stock onto the clamp inside the CNC machining equipment and then manually tighten the screws to secure it. After clamping, the CNC machining equipment automatically processes the bar stock. This clamping method is inefficient, requires significant manual labor, and hinders the improvement of production capacity. Utility Model Content

[0003] To solve at least one of the above problems, this utility model provides an automatic feeding fixture and a dual-spindle CNC machining equipment.

[0004] This utility model is achieved using the following solution: This utility model proposes an automatic feeding fixture, including a base, a collet sleeve, and a collet clamp. The collet sleeve is fixedly installed on the base and is a hollow sleeve structure with a central hole. The collet clamp is displaceably installed in the central hole of the collet sleeve. The collet clamp is also a hollow sleeve structure with a central clamping hole for clamping a workpiece. The end of the collet clamp away from the base has an inverted conical structure, and the end of the central hole away from the base has a conical opening. The inverted conical structure can cooperate with the conical opening. The collet clamp can be driven by a driving component to displace relative to the collet sleeve, thereby pressing the workpiece by the conical inner surface of the conical opening of the inverted conical structure of the collet clamp.

[0005] In one embodiment, the collet has a plurality of elongated openings at one end near the inverted conical structure, and the plurality of elongated openings are evenly distributed along the circumference of the collet.

[0006] In one embodiment, the base includes a cylinder assembly with an inner cavity, a piston rod is mounted in the inner cavity of the cylinder assembly, the output end of the piston rod is connected to the collet, and the outer periphery of the piston rod slides and seals with the inner wall of the cylinder.

[0007] In one embodiment, the cylinder assembly includes a lower sealing cover, a cylinder body, and an upper sealing cover. A limiting post is installed on the piston end face of the piston rod. The upper sealing cover or the lower sealing cover is provided with a limiting hole that cooperates with the limiting post. When the piston rod moves up and down, the limiting post is always engaged with the limiting hole.

[0008] In one embodiment, the cylinder assembly and the piston rod form a piston cylinder structure, and a connector sleeve is rotatably installed on the outer circumferential surface of the sleeve. The connector sleeve has two air pipe connector holes, which are respectively connected to the upper and lower cavities of the piston cylinder structure.

[0009] In one embodiment, an upper cover plate is also installed on the outer circumferential surface of the sleeve above the connector sleeve.

[0010] In one embodiment, the base further includes a fixed base plate, which is fixedly installed on the bottom of the cylinder assembly. Fixed positioning sleeves are embedded in both sides of the fixed base plate of the cylinder assembly, and a central positioning sleeve is also provided on the lower part of the cylinder assembly.

[0011] In one embodiment, the cylinder assembly and the piston rod form a piston-cylinder structure, and the piston-cylinder structure is connected to a pressure regulating valve, which controls the cylinder pressure change to adjust the clamping force.

[0012] In one embodiment, the piston rod's outer periphery and the cylinder's inner wall are slidably sealed by a plurality of sealing O-rings.

[0013] This utility model also proposes a dual-spindle CNC machining equipment, which includes a dual-spindle machine base. The dual-spindle machine base is a dual-spindle dual-rotor table structure, including a swing table. The swing table includes two clamping rotary tables, and each of the two clamping rotary tables is equipped with an automatic feeding fixture as described above.

[0014] The technical solution provided by this utility model has the following technical effects: 1. This utility model provides an automatic feeding fixture and a dual-spindle CNC machining equipment. The automatic feeding fixture includes a collet sleeve and a collet, the collet being displaceably installed in the central hole of the collet sleeve. The end of the collet away from the base has an inverted conical structure, and the end of the central hole away from the base has a conical opening. The inverted conical structure can engage with the conical opening. The collet can be driven by a driving component to displace relative to the collet sleeve, thereby pressing the inverted conical structure of the collet against the conical inner surface of the conical opening to clamp the workpiece. This structure utilizes the principle of inclined plane force amplification, converting the relatively small axial tension of the piston cylinder structure into a larger collet clamping force, thus achieving effective workpiece clamping. This clamping structure can be used in conjunction with an automation system to achieve automated workpiece clamping, significantly improving operating speed, avoiding uneven clamping results caused by differences in human skill, and improving personnel safety through unmanned clamping operations, thereby increasing overall production capacity. Furthermore, when it is necessary to switch to the production of bars of other diameters, only the standard collet needs to be replaced, which is simple and quick.

[0015] 2. The automatic feeding fixture of this utility model, combined with a dual-spindle CNC machining equipment, enables dual-station production, which further improves production efficiency and reduces labor costs. Attached Figure Description

[0016] Figure 1 This is a perspective view of the automatic feeding fixture according to an embodiment of the present utility model; Figure 2 This is a full sectional view of the automatic feeding fixture according to an embodiment of this utility model; Figure 3 This is a perspective view of the swing table according to an embodiment of the present utility model; Figure 4 This is a perspective view of the dual-spindle machine tool according to an embodiment of the present utility model; Figure 5 This is a perspective view of a dual-spindle CNC machining equipment according to an embodiment of the present invention. Detailed Implementation

[0017] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0018] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0019] like Figures 1-5 As shown, this embodiment provides an automatic feeding fixture 1, including a base 10. The base 10 includes a fixed base plate 11, a central positioning sleeve 12, a lower sealing cover 13, a cylinder body 14, an upper sealing cover 15, and a fixed positioning sleeve 16. The lower sealing cover 13, the cylinder body 14, and the upper sealing cover 15 form a cylinder assembly 17 with an inner cavity. A piston rod 20 is installed in the inner cavity of the cylinder assembly 17. The outer periphery of the piston rod 18 slides and seals against the inner wall of the cylinder body 14, for example, through a plurality of sealing elements 21. The sealing element 20 is, for example, a sealing O-ring. In addition, the lower sealing cover 13 and the cylinder body 14, and the cylinder body 14 and the upper sealing cover 15 can also be sealed through a plurality of sealing elements 21. The cylinder assembly 17 and the piston rod 18 form a complete piston cylinder structure. In this embodiment, the piston cylinder structure is a piston cylinder structure 20. However, it is not limited to this. In some other embodiments, the piston cylinder structure can also be a hydraulic piston cylinder, etc. Alternatively, an electric telescopic rod can be used to replace the piston cylinder structure.

[0020] The base plate 11 is fixedly installed at the bottom of the cylinder assembly 17 as a basic connection and fixing structure. Fixing and positioning sleeves 16 are embedded in both sides of the base plate 11 to achieve precise installation and positioning of the base plate 11. A center positioning sleeve 12 is also provided at the lower part of the base plate 11 of the cylinder assembly 17 for center positioning.

[0021] A collet 60 is fixedly mounted on the base 10. The collet 60 is a hollow sleeve structure with a central hole 61. The end of the central hole 61 furthest from the base 10 has a tapered opening 611, which is flared in shape. A collet 50 is connected to the output end of the piston rod 18. The collet 50 is displaceably mounted in the central hole 61 of the collet 60. The collet 50 is a hollow sleeve structure with a central clamping hole 53, used for clamping bar stock or other slender cylindrical workpieces. The end of the collet 50 furthest from the base 10 has an inverted tapered structure 51, which mates with the tapered opening 611 of the collet 60.

[0022] The piston cylinder structure 20 can be supplied with compressed air to drive the piston rod 18 to move up and down. When the piston rod 18 is driven to move downward, the collet 50 is driven downward by the piston rod 18. The end of the collet 50 furthest from the base 10 is defined as the upper end. The inverted conical structure 51 at the upper end of the collet 50 is slightly elastically deformed by the conical inner surface of the conical opening 611, thereby clamping the workpiece installed inside. This structure utilizes the principle of inclined plane force amplification, converting the small axial tensile force of the piston cylinder structure 20 into a larger clamping force of the collet 50, thus achieving effective workpiece clamping. This clamping structure can be used in conjunction with an automation system to achieve automated workpiece clamping, significantly improving operating speed, avoiding uneven clamping results caused by differences in human skill, and improving personnel safety through unmanned clamping operations, thereby increasing overall production capacity. Furthermore, when switching to the production of bars of other diameters, only the standard collet needs to be replaced, which is simple and quick. Furthermore, the piston cylinder structure 20 can control the cylinder pressure change through a pressure regulating valve to achieve precise clamping force adjustment.

[0023] Preferably, the compressed air introduced into the piston cylinder structure 20 is processed by components such as filters and pressure reducing valves, which can achieve more precise cylinder pressure regulation and extend the service life of the cylinder.

[0024] Furthermore, the collet 50 has multiple elongated openings 52 at one end near the inverted conical structure 51. The multiple elongated openings 52 are evenly distributed along the circumference of the collet 50. The multiple elongated openings 52 can increase the elastic deformation capability of the end of the collet 50, thereby achieving more effective clamping of the workpiece.

[0025] Since the workpiece may rotate during processing after being clamped and fixed, in order to prevent the air pipe of the piston cylinder structure 20 from getting tangled during rotation, in this embodiment, a connector sleeve 30 is rotatably mounted on the outer circumferential surface of the collet 60. The connector sleeve 30 is rotatably mounted on the outer circumferential surface of the collet 60 through two roller bearings 31. The connector sleeve 30 is provided with two air pipe connector holes 32, which are respectively connected to the upper and lower cavities of the piston cylinder structure 20, thereby being used for driving the piston cylinder structure 20 to enter and exit air.

[0026] Preferably, an upper cover plate 40 is installed on the outer peripheral surface of the sleeve 60 above the connector sleeve 30, and the upper cover plate 40 can provide protection for the internal structure.

[0027] In this embodiment, a piston cylinder structure 20 is used as the driving component for the displacement of the collet 50. In other embodiments, the driving component of the collet 50 may also be a hydraulic piston cylinder or an electric telescopic rod, etc.

[0028] In this embodiment, a limiting post 19 is installed on the piston end face of the piston rod 18, and a limiting hole 151 that mates with the limiting post 19 is provided on the lower surface of the upper sealing cover 15. When the piston rod 18 moves up and down, the limiting post 19 is always engaged with the limiting hole 151, thereby restricting the relative rotation between the piston rod 18 and the cylinder assembly 17, thus making the clamping of the workpiece by the collet 50 more stable. In some other embodiments, the limiting hole 151 may also be provided on the lower sealing cover 13.

[0029] To further increase production capacity, please refer to Figures 3-5 This embodiment also provides a dual-spindle CNC machining equipment 100, which includes a dual-spindle machine base 110. The dual-spindle machine base 110 has a dual-spindle, dual-rotor table structure, including a swing table 120. The swing table 120 includes two fixture rotary tables 121, each of which is equipped with an automatic feeding fixture 1. Since the machine base 110 has a dual-spindle, dual-rotor table structure, the automatic feeding fixture 1, in conjunction with the dual-spindle CNC machining equipment 100, enables dual-station production, further improving production efficiency while reducing labor costs.

[0030] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An automatic feeding fixture, comprising a base, characterized in that, It also includes a collet sleeve and a collet clamp. The collet sleeve is fixedly installed on the base. The collet sleeve is a hollow sleeve structure with a central hole. The collet clamp is displaceably installed in the central hole of the collet sleeve. The collet clamp is a hollow sleeve structure with a central clamping hole for clamping a workpiece. The end of the collet clamp away from the base has an inverted conical structure, and the end of the central hole away from the base has a conical opening. The inverted conical structure can cooperate with the conical opening. The collet clamp can be driven by a driving component to displace relative to the collet sleeve, so that the inverted conical structure of the collet clamp is squeezed by the conical inner surface of the conical opening to clamp the workpiece.

2. The automatic feeding fixture according to claim 1, characterized in that: The collet has multiple elongated openings at one end near the inverted conical structure, and the multiple elongated openings are evenly distributed along the circumference of the collet.

3. The automatic feeding fixture according to claim 1, characterized in that: The base includes a cylinder assembly with an inner cavity, a piston rod is installed in the inner cavity of the cylinder assembly, the output end of the piston rod is connected to the collet, and the outer periphery of the piston rod slides and seals with the inner wall of the cylinder.

4. The automatic feeding fixture according to claim 3, characterized in that: The cylinder assembly includes a lower sealing cover, a cylinder body, and an upper sealing cover. A limiting post is installed on the piston end face of the piston rod. The upper sealing cover or the lower sealing cover is provided with a limiting hole that mates with the limiting post. When the piston rod moves up and down, the limiting post always mates with the limiting hole.

5. The automatic feeding fixture according to claim 3, characterized in that: The cylinder assembly and the piston rod form a piston cylinder structure. A connector sleeve is rotatably installed on the outer circumferential surface of the sleeve. The connector sleeve has two air pipe connector holes, which are respectively connected to the upper and lower cavities of the piston cylinder structure.

6. The automatic feeding fixture according to claim 5, characterized in that: The outer circumferential surface of the sleeve is also fitted with an upper cover plate above the joint swivel.

7. The automatic feeding fixture according to claim 3, characterized in that: The base also includes a fixed base plate, which is fixedly installed at the bottom of the cylinder assembly. Fixed positioning sleeves are embedded in both sides of the fixed base plate of the cylinder assembly, and a central positioning sleeve is also provided at the lower part of the cylinder assembly.

8. The automatic feeding fixture according to claim 3, characterized in that: The cylinder assembly and the piston rod form a piston-cylinder structure. The piston-cylinder structure is connected to a pressure regulating valve, which controls the cylinder pressure to adjust the clamping force.

9. The automatic feeding fixture according to claim 3, characterized in that: The piston rod's outer periphery and the cylinder's inner wall achieve a sliding seal through several sealing O-rings.

10. A dual-spindle CNC machining equipment, the dual-spindle CNC machining equipment comprising a dual-spindle machine base, the dual-spindle machine base being a dual-spindle dual-rotor table structure, including a swing table, the swing table including two fixture rotary tables, each of the two fixture rotary tables being equipped with an automatic feeding fixture as described in any one of claims 1-9.

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