Quick replacement structure for milling head of numerical control milling machine

Abstract

The utility model is applicable to the technical field of numerical control milling machines, and provides a numerical control milling head quick replacement structure which comprises a fixed seat, a rotating mechanism, a mounting block, an adjusting block and a clamping mechanism, the adjusting block is fixed on the fixed seat and positioned above the mounting block, one side of the adjusting block is provided with an adjusting groove, and the clamping mechanism is arranged in the adjusting groove. The clamping mechanisms are circumferentially distributed on the mounting block along the axis of the mounting block and intermittently abut against the adjusting block and the adjusting groove. According to the quick replacement structure for the milling head of the numerical control milling machine, under the condition that the rotating mechanism works independently, the clamping mechanism is matched with the mounting block, the adjusting block and the adjusting groove, so that limiting and fixing of a milling cutter needing to be replaced can be quickly relieved, and quick replacement of the milling cutter is realized; and the remaining milling cutters can be rapidly clamped and fixed, the complex step that in a traditional mode, other structures need to be adopted for independently fixing the milling cutters is abandoned, and the mounting stability of the milling cutters on the mounting block is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of numerical control milling machines, and in particular relates to a rapid replacement structure for a numerical control milling head. Background Art

[0002] As a kind of processing equipment with multiple uses, milling machine can mill parts of any shape on the workpiece, such as planes, bevels and other irregular-shaped processing surfaces, grooves, gears, cams, thread cutting, drilling and reaming, etc. CNC milling machine is an automatic processing equipment developed on the basis of general milling machine. The processing technology of the two is basically the same and the structure is somewhat similar. Due to the different processing types and types of processed workpieces, the milling head (i.e. milling cutter) on the CNC milling machine needs to be replaced according to actual needs.

[0003] The existing CNC milling head quick replacement structure includes a rotating component and a fixed component. The fixed components are distributed on the rotating component. The rotating component can drive multiple fixed components and the milling cutters thereon to rotate, so that the specified milling cutter can be rotated to the bottom of the tool holder, which is convenient for quick replacement of the milling cutter. The fixed component can clamp and fix the milling cutter on it by telescoping to ensure the stability of the milling cutter in the rotating state.

[0004] Although the existing replacement structure can complete the replacement of the milling cutter, the multiple fixed components on the rotating component all work independently and are individually connected to the control system. Multiple independently working fixed components mean that more mechanical parts and electrical connections are required, which not only increases the manufacturing cost, but also makes the entire replacement structure larger, which is not conducive to the compact layout of the equipment. At the same time, since each fixed component needs to be controlled separately, this also increases the difficulty of designing the control system and the complexity of programming.

[0005] Therefore, in view of the above situation, there is an urgent need to develop a CNC milling head quick replacement structure to overcome the shortcomings in current practical applications. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the embodiments of the present invention is to provide a CNC milling head quick replacement structure to solve the problems in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A CNC milling head quick-change structure includes a fixed base fixed on a CNC milling machine, the fixed base is sequentially provided with a rotating mechanism and a mounting block, the rotating mechanism is fixedly connected to the outer wall of the mounting block, and the mounting block adopts a circular block structure, and milling cutters of various specifications are distributed circumferentially on the mounting block, and further includes:

[0009] An adjustment block, fixed on the fixing seat and located above the mounting block, the adjustment block adopts a circular block structure, and the adjustment block and the mounting block are concentric, and one side of the adjustment block is provided with an adjustment slot toward its axis;

[0010] A clamping mechanism, wherein the clamping mechanism is distributed on the mounting block along the axis of the mounting block, and the plurality of clamping mechanisms are respectively used to clamp and fix the plurality of milling cutters, and the plurality of clamping mechanisms are respectively in intermittent contact with the outer wall of the adjustment block and the adjustment groove;

[0011] The rotating mechanism drives the mounting block to rotate intermittently, and the mounting block drives the clamping mechanism and the milling cutter thereon to rotate intermittently. When the clamping mechanism rotates to conflict with the outer wall of the adjustment block, the clamping mechanism clamps and fixes the milling cutter thereon. When the clamping mechanism rotates to conflict with the adjustment slot, the clamping mechanism releases the clamping and fixation of the milling cutter. When the rotating mechanism works alone, the clamping mechanism quickly releases the limit and fixation of the milling cutter to be replaced and quickly clamps and fixes the remaining milling cutters by cooperating with the mounting block, the adjustment block and the adjustment slot.

[0012] As a further technical solution of the present invention, the rotating mechanism includes a motor, a gear and an annular rack. The motor is fixed on a fixed seat. A gear is fixed on the output end of the motor. The gear is engaged with an annular rack fixed on the outer wall of the mounting block.

[0013] As a further technical solution of the present invention, the clamping mechanism includes a mounting frame, a fixed block, a control block, a spring A, a clamping block, a spring B and a connecting groove. The mounting frame is distributed on the mounting block along the circumference of the axis of the mounting block. A fixed block is fixed on one side of the mounting frame, and clamping blocks are symmetrically slidably installed at both ends of one side of the fixed block. One end of the clamping block is movably connected to the fixed block through a spring B, and a control block is slidably installed on the other side of the mounting frame. One end of the control block is movably connected to the mounting frame through a spring A, and one end of the control block intermittently conflicts with the outer wall of the adjustment block and the adjustment groove, and the other end of the control block intermittently cooperates with the connecting groove opened on the clamping block.

[0014] As a further technical solution of the present invention, arc grooves for clamping the milling cutter are provided on the inner side of the clamping block and the inner side of the fixed block. The fixed block adopts a Y-shaped block structure, and the end faces of the fixed block that conflict with the inner wall of the connecting groove are both inclined end faces.

[0015] As a further technical solution of the present invention, the inner wall of the arc-shaped groove on the fixed block is provided with a first sliding groove in the vertical direction and a second sliding groove in the horizontal direction, the first sliding groove is connected to the second sliding groove, and the first sliding groove and the second sliding groove are both slidably matched with the limit pin shaft fixed on the outer wall of the milling cutter.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The rotating mechanism drives the mounting block to rotate intermittently by a certain angle, and the mounting block drives the clamping mechanism and the milling cutter thereon to rotate intermittently. When the clamping mechanism rotates to conflict with the outer wall of the adjusting block, the clamping mechanism clamps and fixes the milling cutter thereon, ensuring the stability of the milling cutter during rotation. When the clamping mechanism rotates to conflict with the adjusting slot, the clamping mechanism releases the clamping and fixation of the milling cutter, which is convenient for the tool holder on the CNC milling machine to quickly grab the milling cutter in a free state. The clamping mechanism cooperates with the mounting block, the adjusting block and the adjusting slot. When the rotating mechanism works alone, it can not only quickly release the limit and fixation of the milling cutter to be replaced, but also facilitate the tool holder to quickly grab the milling cutter, thereby realizing rapid replacement of the milling cutter, and can also quickly clamp and fix the remaining milling cutters, ensuring the installation stability of the milling cutter on the mounting block, abandoning the complex steps of fixing the milling cutter separately by other structures in the traditional method, reducing the complexity of the replacement structure and improving the overall performance.

[0018] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural schematic diagram of the first perspective of the CNC milling head quick replacement structure provided by an embodiment of the utility model.

[0020] Figure 2 A structural schematic diagram of the second perspective of the CNC milling head quick replacement structure provided by an embodiment of the utility model.

[0021] Figure 3 for Figure 1 Enlarged view of the structure of the clamping mechanism.

[0022] Figure 4 for Figure 3 Exploded view of the clamping mechanism.

[0023] Figure markings: 1-fixed seat, 2-adjusting block, 21-adjusting slot, 3-mounting block, 4-rotating mechanism, 41-motor, 42-gear, 43-annular rack, 5-clamping mechanism, 51-mounting frame, 52-fixed block, 53-control block, 54-spring A, 55-clamping block, 56-spring B, 57-connecting slot, 58-first slide slot, 59-second slide slot, 6-milling cutter, 7-limiting pin. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0026] like Figures 1 to 4 As shown, as an embodiment of the present invention, a CNC milling head quick replacement structure is provided, which includes a fixed base 1 fixed on a CNC milling machine, wherein the fixed base 1 is sequentially provided with a rotating mechanism 4 and a mounting block 3, wherein the rotating mechanism 4 is fixedly connected to the outer wall of the mounting block 3, and the mounting block 3 preferably adopts a circular block structure, wherein the mounting block 3 is circumferentially distributed with a plurality of milling cutters 6 of different specifications, and further includes:

[0027] An adjustment block 2, fixed to the fixing base 1 and located above the mounting block 3. The adjustment block 2 preferably has a circular block structure and is concentric with the mounting block 3. An adjustment slot 21 is formed on one side of the adjustment block 2 toward its axis.

[0028] The clamping mechanisms 5 are distributed on the mounting block 3 along the axis of the mounting block 3. The plurality of clamping mechanisms 5 clamp and fix the plurality of milling cutters 6, and the plurality of clamping mechanisms 5 intermittently contact the outer wall of the adjustment block 2 and the adjustment groove 21.

[0029] The rotating mechanism 4 drives the mounting block 3 to rotate intermittently at a certain angle, and the mounting block 3 drives the clamping mechanism 5 and the milling cutter 6 thereon to rotate intermittently. When the clamping mechanism 5 rotates to conflict with the outer wall of the adjustment block 2, the clamping mechanism 5 clamps and fixes the milling cutter 6 thereon to ensure the stability of the milling cutter 6 during rotation. When the clamping mechanism 5 rotates to conflict with the adjustment slot 21, the clamping mechanism 5 releases the clamping and fixation of the milling cutter 6, which facilitates the tool holder on the CNC milling machine to quickly grab the milling cutter 6 in a free state. The clamping mechanism 5 is fixed by The mounting block 3, the adjustment block 2 and the adjustment slot 21 cooperate with each other, and when the rotating mechanism 4 works alone, not only can the limit and fixation of the milling cutter 6 to be replaced be quickly released, and the tool holder can quickly grab the milling cutter 6, thereby realizing the rapid replacement of the milling cutter 6, but also the remaining milling cutters 6 can be quickly clamped and fixed, ensuring the installation stability of the milling cutter 6 on the mounting block 3, abandoning the complex steps of fixing the milling cutter 6 separately by other structures in the traditional method, reducing the complexity of the replacement structure and improving the overall performance.

[0030] like Figures 1 to 4 As shown, as a preferred embodiment of the present invention, the rotating mechanism 4 includes a motor 41, a gear 42 and an annular rack 43. The motor 41 is fixed on the fixed base 1, and a gear 42 is fixed on the output end of the motor 41. The gear 42 is engaged with the annular rack 43 fixed on the outer wall of the mounting block 3.

[0031] In this embodiment, the control system controls the speed and rotation angle of the motor 41 according to the data input by the user, so that the motor 41 can drive the gear 42 to rotate the specified angle, and the gear 42 can drive the mounting block 3 to rotate the specified angle through the annular rack 43. The mounting block 3 drives the clamping mechanism 5 and the milling cutter 6 thereon to rotate the specified angle, so that the clamping mechanism 5 that matches the milling cutter 6 required to be replaced by the user can be rotated to a mode that matches the adjustment slot 21, and then the clamping mechanism 5 can release the limit and fixation of the milling cutter 6 that needs to be replaced, providing convenient conditions for the tool holder on the CNC milling machine, so that it can quickly and accurately grasp the milling cutter 6 that needs to be replaced, greatly simplifying the tool replacement process, and improving work efficiency, thereby realizing the rapid replacement of the milling cutter 6.

[0032] In a preferred embodiment, the control system preferably adopts a CNC control system dedicated to CNC milling machines, which includes a processing control system for processing the workpiece, a replacement control system for replacing the milling cutter 6, a cleaning control system for quickly cleaning the processing chips on the workpiece surface, and a fixing control system for clamping and fixing the workpiece.

[0033] like Figures 1 to 4As shown, as a preferred embodiment of the present invention, the clamping mechanism 5 includes a mounting frame 51, a fixed block 52, a control block 53, a spring A54, a clamping block 55, a spring B56 and a connecting groove 57. The mounting frame 51 is distributed on the mounting block 3 along the axis of the mounting block 3. A fixed block 52 is fixed on one side of the mounting frame 51, and clamping blocks 55 are symmetrically slidably installed at both ends of one side of the fixed block 52. One end of the clamping block 55 is movably connected to the fixed block 52 through a spring B56. A control block 53 is slidably installed on the other side of the mounting frame 51. One end of the control block 53 is movably connected to the mounting frame 51 through a spring A54, and one end of the control block 53 intermittently conflicts with the outer wall of the adjustment block 2 and the adjustment groove 21, and the other end of the control block 53 intermittently cooperates with the connecting groove 57 opened on the clamping block 55.

[0034] like Figures 1 to 4 As shown, as a preferred embodiment of the present invention, the inner side of the clamping block 55 and the inner side of the fixed block 52 are both provided with arc grooves for clamping the milling cutter 6, and the fixed block 52 preferably adopts a Y-shaped block structure, and the end faces of the fixed block 52 that conflict with the inner wall of the connecting groove 57 are both inclined end faces.

[0035] In this embodiment, when the clamping mechanism 5 rotates with the mounting block 3 and the control block 53 comes into contact with the outer wall of the adjustment block 2, the adjustment block 2 can squeeze the control block 53, causing the control block 53 to move toward the clamping block 55. At this time, the spring A54 is in a compressed state, and the control block 53 can drive the two clamping blocks 55 to move toward each other by moving and cooperating with the connecting groove 57. The two clamping blocks 55 can effectively clamp and fix the milling cutter 6 retained on the fixed block 52 by cooperating with the fixed block 52, thereby ensuring the stability of the milling cutter 6 during rotation.

[0036] When the clamping mechanism 5 rotates with the mounting block 3 and the control block 53 conflicts with the adjustment slot 21, the spring A54 in the compressed state is able to release its own elastic force and drive the control block 53 to move in the direction away from the clamping block 55. The spring B56 can also release its own elastic force and drive the two clamping blocks 55 to move in the opposite direction. The two clamping blocks 55 can release the limitation and fixation of the milling cutter 6 by moving in the opposite direction, so that the milling cutter 6 is in a free state on the fixing block 52, which makes it convenient for the tool holder to quickly grab the milling cutter 6, thereby realizing the rapid replacement of the milling cutter 6. The remaining milling cutters 6 can also be quickly clamped and fixed to ensure the installation stability of the milling cutter 6 on the mounting block 3, abandoning the complex steps of fixing the milling cutter 6 separately with other structures in the traditional method, reducing the complexity of the replacement structure and improving the overall performance.

[0037] like Figures 1 to 4 As shown, as a preferred embodiment of the present invention, the inner wall of the arc-shaped groove on the fixed block 52 is provided with a first slide groove 58 in the vertical direction and a second slide groove 59 in the horizontal direction, the first slide groove 58 is connected to the second slide groove 59, and the first slide groove 58 and the second slide groove 59 are both slidably matched with the limit pin 7 fixed on the outer wall of the milling cutter 6. When the tool holder drives the initial milling cutter 6 to move to the top of the clamping mechanism 5 which is in conflict with the adjustment groove 21 and is in an idle state, the tool holder drives the milling cutter 6 to move downward and allows the limit pin 7 to slide in the first slide groove 58. When the limit pin When 7 slides into the second slide groove 59, the tool holder stops moving down and drives the milling cutter 6 to perform a circular motion, so that the limit pin shaft 7 can enter the second slide groove 59 and stay in the fixed block 52, so that the tool holder can release the initial milling cutter 6. This not only ensures that the milling cutter 6 can stay stably on the fixed block 52, but also facilitates the subsequent clamping block 55 to effectively clamp and fix it. Similarly, after the clamping block 55 releases the limit and fixation of the milling cutter 6, the tool holder can remove the milling cutter 6 from the fixed block 52 by rotating and moving upward, thereby realizing rapid replacement of the milling cutter 6.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A CNC milling head quick-change structure, comprising a fixed base fixed on a CNC milling machine, wherein the fixed base is sequentially provided with a rotating mechanism and a mounting block, wherein the rotating mechanism is fixedly connected to the outer wall of the mounting block, and the mounting block adopts a circular block structure, wherein the mounting block is circumferentially distributed with milling cutters of various specifications, characterized in that: Also includes: An adjustment block, fixed on the fixing seat and located above the mounting block, the adjustment block adopts a circular block structure, and the adjustment block and the mounting block are concentric, and one side of the adjustment block is provided with an adjustment slot toward its axis; A clamping mechanism, wherein the clamping mechanism is distributed on the mounting block along the axis of the mounting block, and the plurality of clamping mechanisms are respectively used to clamp and fix the plurality of milling cutters, and the plurality of clamping mechanisms are respectively in intermittent contact with the outer wall of the adjustment block and the adjustment groove; The rotating mechanism drives the mounting block to rotate intermittently, and the mounting block drives the clamping mechanism and the milling cutter thereon to rotate intermittently. When the clamping mechanism rotates to conflict with the outer wall of the adjustment block, the clamping mechanism clamps and fixes the milling cutter thereon. When the clamping mechanism rotates to conflict with the adjustment slot, the clamping mechanism releases the clamping and fixation of the milling cutter. When the rotating mechanism works alone, the clamping mechanism quickly releases the limit and fixation of the milling cutter to be replaced and quickly clamps and fixes the remaining milling cutters by cooperating with the mounting block, the adjustment block and the adjustment slot.

2. The CNC milling head quick replacement structure according to claim 1, characterized in that: The rotating mechanism includes a motor, a gear and an annular rack. The motor is fixed on a fixing seat. A gear is fixed on the output end of the motor. The gear is engaged with the annular rack fixed on the outer wall of the mounting block.

3. The CNC milling head quick replacement structure according to claim 1, characterized in that: The clamping mechanism includes a mounting frame, a fixed block, a control block, a spring A, a clamping block, a spring B and a connecting groove. The mounting frame is distributed on the mounting block along the circumference of the axis of the mounting block. A fixed block is fixed on one side of the mounting frame, and clamping blocks are symmetrically slidably installed at both ends of one side of the fixed block. One end of the clamping block is movably connected to the fixed block through a spring B, and a control block is slidably installed on the other side of the mounting frame. One end of the control block is movably connected to the mounting frame through a spring A, and one end of the control block intermittently conflicts with the outer wall of the adjustment block and the adjustment groove, and the other end of the control block intermittently cooperates with the connecting groove opened on the clamping block.

4. The CNC milling head quick replacement structure according to claim 3 is characterized in that: The inner sides of the clamping block and the fixed block are both provided with arc grooves for clamping the milling cutter. The fixed block adopts a Y-shaped block structure, and the end faces of the fixed block that conflict with the inner wall of the connecting groove are both inclined end faces.

5. The CNC milling head quick replacement structure according to claim 3, characterized in that: The inner wall of the arc-shaped groove on the fixed block is provided with a first sliding groove in the vertical direction and a second sliding groove in the horizontal direction, respectively. The first sliding groove is connected to the second sliding groove, and the first sliding groove and the second sliding groove are both slidably matched with the limit pin shaft fixed on the outer wall of the milling cutter.

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