Spindle connecting flange structure for expansion type cutter

Abstract

The invention relates to the technical field of numerical control cutter production, in particular to a main shaft connecting flange structure for an expanded cutter, which comprises a flange and a cutter base, a plurality of positioning holes are formed in the flange, a plurality of air inlets are formed in the side wall of the flange, and placing grooves in the diameter direction are formed in the positioning holes corresponding to the flange; an air supply channel is formed between the air inlet and the containing groove, a steel ball matched with the containing groove is arranged in the containing groove, a plurality of positioning pins are arranged at the lower end of the tool base, the flange rotates to drive the steel ball to rotate, and the steel ball is stably clamped in the containing groove to be locked under the action of centrifugal force. Air is conveyed into the placing groove through the air inlet to further lock the steel ball; the problems that the expansion type cutter needs to be assembled and disassembled by disassembling a bolt and a nut on a machine tool, or the expansion type cutter needs to be assembled and disassembled by rotating a quick-change locking pin through a special tool, the cutter changing process is tedious, and the locking effect is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of CNC tool production, and in particular to a spindle connecting flange structure for an expanded tool. Background Art

[0002] A flange is a part that connects shafts to each other and is used to connect pipe ends. A Chinese utility model patent with application announcement number CN217433083U discloses a pull rod expansion type composite tool, including: a tool body, the tool body has a processing inner cavity, the processing inner cavity is provided with a rotating shaft, the rotating shaft is connected to an oil groove, the oil groove is connected to an oil through hole, the oil through hole is inserted into an oil filling hole, the oil filling hole is located in a tool block, the tool block drives a connecting rod to move, the connecting rod is connected to a positioning shaft, and the positioning shaft is connected to a pull rod. A Chinese invention patent with application announcement number CN106975779B discloses an internal feed tool, a tool rod guide sleeve is provided on the outer portion of the front section of the tool rod, the tool rod is inserted into the hole of the workpiece to be processed and is positioned by the tool rod guide sleeve, and there is no need to repeatedly adjust the concentricity, and the positioning is convenient; the guide sleeve makes the tool rod run smoothly relative to the workpiece, the processing accuracy is high, the processing surface flatness is good, and the symmetry of the keyway processing is improved.

[0003] However, the inventors have found that in actual use, the deployable tool needs to be loaded and unloaded on the machine tool by removing the bolts and nuts, or by rotating the quick-change locking pin with a special tool. The tool changing process is relatively cumbersome and the locking effect is poor. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the prior art. By opening a placement groove in the diameter direction in the positioning hole corresponding to the flange, a matching steel ball is arranged in the placement groove, and the steel ball is driven to rotate by rotating the flange. Under the action of centrifugal force, the steel ball is firmly stuck in the placement groove and kept locked, and air is delivered to the placement groove through the air inlet to further lock the steel ball, thereby solving the problem that the expandable tool needs to be loaded and unloaded on the machine tool by disassembling the bolts and nuts, or by rotating the quick-change locking pin with a special tool, the tool changing process is relatively cumbersome, and the locking effect is poor.

[0005] In view of the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A spindle connecting flange structure for an expandable tool comprises a flange and a tool base, wherein the flange is provided with a plurality of positioning holes, the flange side wall is provided with a plurality of air inlets, a placement groove in a diameter direction is provided in the positioning holes corresponding to the flange, an air supply channel is provided between the air inlet and the placement groove, a steel ball matching therewith is provided in the placement groove, a plurality of positioning pins are provided at the lower end of the tool base, the steel ball is driven to rotate by the rotation of the flange, the steel ball is firmly stuck in the placement groove and remains locked under the action of centrifugal force, and air is transported to the placement groove through the air inlet to further lock the steel ball.

[0007] As a preferred embodiment, part of the steel ball leaks out of the positioning hole, and a spring is arranged between the steel ball and the placement groove.

[0008] As a preference, the steel ball is made of hard alloy with high density.

[0009] As a preference, an accelerating tube is provided at one end of the air supply channel close to the placement slot.

[0010] As a preferred embodiment, the side walls at both ends of the placement groove are provided with air outlet channels, the middle part of the flange is provided with a plurality of air outlets, and the air outlet channels are connected with the air outlets.

[0011] As a preferred embodiment, a semicircular groove is provided on the positioning pin.

[0012] As a preference, the air inlet is arranged at an angle, and its inclination direction is the same as the rotation direction of the flange.

[0013] As another preferred embodiment, the air outlet is arranged tilted, and its tilting direction is opposite to the rotation direction of the flange.

[0014] Beneficial effects of the present invention:

[0015] 1. In the present invention, a placement groove in the diameter direction is opened in the positioning hole corresponding to the flange, a steel ball matching the placement groove is arranged, and the steel ball is driven to rotate by the rotation of the flange. The steel ball is firmly stuck in the placement groove and kept locked under the action of centrifugal force, and air is transported to the placement groove through the air inlet to further lock the steel ball, thereby achieving convenient disassembly and assembly and improving the locking effect.

[0016] In summary, the equipment has the advantages of convenient disassembly and assembly, improved locking effect, etc., and is particularly suitable for the field of CNC tool production technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the structure of the unfolded tool;

[0019] Figure 2 Schematic diagram of the structure of the spindle connecting flange for the unfolded tool

[0020] Figure 3 It is a schematic diagram of the structure of the flange;

[0021] Figure 4 It is a cross-sectional schematic diagram of the flange;

[0022] Figure 5 for Figure 4 A in the enlarged view;

[0023] Figure 6 It is a structural schematic diagram of the tool base;

[0024] Figure 7 It is a working state diagram of the spindle connection flange structure for the unfolded tool;

[0025] Figure 8 This is the working state diagram of the expanded tool spring compression.

[0026] 1. Flange; 2. Tool base; 3. Positioning hole; 4. Placement slot; 5. Air supply channel; 6. Steel ball; 7. Positioning pin; 11. Air inlet; 12. Air outlet; 41. Air outlet channel; 51. Accelerator tube; 61. Spring; 71. Semicircular groove. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings.

[0028] Embodiment 1

[0029] like Figures 1 to 8As shown, a spindle connecting flange structure for an expandable tool comprises a flange 1 and a tool base 2, wherein the flange 1 is provided with a plurality of positioning holes 3, and the side wall of the flange 1 is provided with a plurality of air inlets 11, and the positioning holes 3 corresponding to the flange 1 are provided with placement grooves 4 in the diameter direction, and an air supply channel 5 is provided between the air inlet 11 and the placement groove 4, and a matching steel ball 6 is provided in the placement groove 4, and a plurality of positioning pins 7 are provided at the lower end of the tool base 2, and the steel ball 6 is driven to rotate by the rotation of the flange 1, and the steel ball 6 is firmly stuck in the placement groove 4 and kept locked under the action of centrifugal force, and the air is transported to the placement groove 4 through the air inlet 11 to further lock the steel ball 6.

[0030] It is worth mentioning here that a placement groove 4 in the diameter direction is opened in the positioning hole 3 corresponding to the flange 1, and a matching steel ball 6 is arranged in the placement groove 4. The steel ball 6 is driven to rotate by the rotation of the flange 1. Under the action of centrifugal force, the steel ball 6 is firmly stuck in the placement groove 4 and remains locked. The air is delivered to the placement groove 4 through the air inlet 11 to further lock the steel ball 6, thereby achieving convenient disassembly and assembly and improving the locking effect.

[0031] like Figure 4 As shown, part of the steel ball 6 leaks out of the positioning hole 3 , and a spring 61 is arranged between the steel ball 6 and the placement groove 4 .

[0032] In this example, a spring 61 is provided to provide the steel ball 6 with an elastic force for locking the positioning pin 7 .

[0033] like Figure 4 As shown, the steel ball 6 is made of a high-density cemented carbide.

[0034] In this example, the steel ball 6 is made of a hard alloy with a high density in order to improve its quality. During the rotation process, its inertia is relatively large, thereby increasing the locking force on the positioning pin 7.

[0035] like Figure 4 As shown, an accelerating tube 51 is provided at one end of the air supply channel 5 close to the placement slot 4.

[0036] In this example, by setting the accelerating tube 51 to be wide at both sides and narrow in the middle, the wind blowing into the placement slot 4 is accelerated, so that the steel ball 6 further locks the positioning pin 7.

[0037] like Figure 4 As shown, the side walls at both ends of the placement slot 4 are provided with air outlet channels 41 , and the middle portion of the flange 1 is provided with a plurality of air outlets 12 , and the air outlet channels 41 are communicated with the air outlets 12 .

[0038] In this example, the wind blown into the placement slot 4 is discharged through the air outlet channel 41, so that the steel ball 6 is continuously squeezed by the wind force, further locking the positioning pin 7. In addition, the discharged wind is blown out through the air outlet 12 to cool the unfolded tool.

[0039] like Figure 5 As shown, a semicircular groove 71 is formed on the positioning pin 7 .

[0040] In this example, the diameter of the semicircular groove 71 is the same as that of the steel ball 6 .

[0041] like Figure 4 As shown, the air inlet 11 is arranged tilted, and its tilting direction is the same as the rotation direction of the flange 1.

[0042] In this example, by such an arrangement, wind can quickly enter the air supply channel 5.

[0043] like Figure 4 As shown, the air outlet 12 is arranged tilted, and its tilting direction is opposite to the rotation direction of the flange 1.

[0044] In this example, by such an arrangement, the wind can flow out of the air outlet channel 41 quickly, the air flow rate inside the flange 1 is accelerated, and the locking force of the steel ball 6 is increased.

[0045] The working process is as follows:

[0046] The tool base 2 is mounted on the flange 1, the positioning pin 7 is inserted into the positioning hole 3, and the steel ball 6 is squeezed and pressed into the placement groove 4 until the positioning pin 7 is installed in place. The steel ball 6 is ejected into the semicircular groove 71 under the action of the spring 61 to lock it;

[0047] Start the equipment, the flange 1 rotates, and the steel ball 6 is firmly stuck in the placement groove 4 and remains locked under the action of centrifugal force. The outside air enters the air supply channel 5 through the air inlet 11, and the wind blown into the placement groove 4 is accelerated by the acceleration tube 51, so that the steel ball 6 further locks the positioning pin 7, and the wind blown into the placement groove 4 is guided out through the air outlet channel 41, so that the steel ball 6 is continuously squeezed by the wind force, and the positioning pin 7 is further locked. In addition, the guided wind is blown out through the air outlet 12 to cool the unfolded tool;

[0048] After the device is turned off, the tool base 2 can be directly taken out, which is convenient for disassembly and assembly.

[0049] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A spindle connecting flange structure for an expandable tool, comprising a flange (1) and a tool base (2), characterized in that: The flange (1) is provided with a plurality of positioning holes (3), the side wall of the flange (1) is provided with a plurality of air inlets (11), a placement groove (4) in a diameter direction is provided in the positioning hole (3) corresponding to the flange (1), an air supply channel (5) is provided between the air inlet (11) and the placement groove (4), a steel ball (6) matching with the placement groove (4) is provided in the placement groove (4), a plurality of positioning pins (7) are provided at the lower end of the tool base (2), the steel ball (6) is driven to rotate by the rotation of the flange (1), the steel ball (6) is firmly stuck in the placement groove (4) and remains locked under the action of centrifugal force, and air is transported to the placement groove (4) through the air inlet (11) to further lock the steel ball (6).

2. The spindle connecting flange structure for an expandable tool according to claim 1, characterized in that: The steel ball (6) partially leaks out of the positioning hole (3), and a spring (61) is arranged between the steel ball (6) and the placement groove (4).

3. The spindle connecting flange structure for an expandable tool according to claim 2, characterized in that: The steel ball (6) is made of hard alloy with high density.

4. The spindle connecting flange structure for an expandable tool according to claim 1, characterized in that: An accelerating tube (51) is provided at one end of the air supply channel (5) close to the placement slot (4).

5. The spindle connecting flange structure for an expandable tool according to claim 1, characterized in that: The side walls at both ends of the placement groove (4) are provided with air outlet channels (41), the middle portion of the flange (1) is provided with a plurality of air outlets (12), and the air outlet channels (41) are in communication with the air outlets (12).

6. The spindle connecting flange structure for an expandable tool according to claim 1, characterized in that: The positioning pin (7) is provided with a semicircular groove (71).

7. The spindle connecting flange structure for an expandable tool according to claim 6, characterized in that: The air inlet (11) is arranged tilted, and its tilting direction is the same as the rotation direction of the flange (1).

8. The spindle connecting flange structure for an expandable tool according to claim 5, characterized in that: The air outlet (12) is arranged tilted, and its tilting direction is opposite to the rotation direction of the flange (1).

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