High-precision four-axis turntable machining structure

Abstract

The utility model discloses a high-precision four-shaft rotary table machining structure which comprises a driving shaft machine base body connected with a speed reduction motor and a guard base composed of a roller cam located on the other side of a driving shaft, rotary tables are arranged on the opposite faces of the driving shaft and the roller cam, and a machining shaft platform is arranged between the rotary tables. Stabilizing pieces are arranged at included angles of contact positions of the processing shaft platform and the turntables on the two sides; two surfaces of each stabilizing piece cling to one surfaces of the processing shaft platform and the turntables respectively. The four-axis rotary table solves the problem that the machining precision of a four-axis rotary table in the prior art is easily influenced by the weight of a workpiece and is low.

Description

Technical Field

[0001] The utility model relates to the field of processing turntables, in particular to a high-precision four-axis turntable processing structure. Background Art

[0002] With the progress of the times, the industry is also constantly improving, especially in the CNC machine tool industry, which has been constantly changing its technology in recent years. The fourth-axis CNC rotary table is more and more frequently used because it can process workpieces more efficiently and accurately. The four-axis rotary table on the market is usually composed of a reduction motor, a moving axis on both sides and a processing axis in the middle. When processing, the workpiece to be processed is placed and fixed on the central rotary table, and the motor on one side (or both sides) drives the rotation for processing.

[0003] However, when heavy objects are placed on the turntable, the platform is affected by the weight, which will produce a small angle (offset) with the joints of the rotating shafts on both sides. Moreover, due to the high-speed rotation of the turntable during operation, the offset of the rotating shaft is magnified, which will directly affect the processing accuracy.

[0004] In view of this, the present technical solution proposes a high-precision four-axis turntable processing structure, in which a turntable (boss) protruding inward from the moving shafts on both sides can "support" the force-bearing front end part of the platform, and a stabilizing member is provided at the angle between the turntable and the processing platform to further support the platform, so that the four-axis turntable has the characteristics of high-precision processing. Utility Model Content

[0005] The technical solution of the utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the main purpose of the utility model is to provide a high-precision four-axis turntable processing structure, aiming to solve the problem that the processing precision of the four-axis turntable in the prior art is easily affected by the weight of the workpiece and is low.

[0006] To achieve the above purpose, the utility model provides a high-precision four-axis turntable processing structure, including a driving shaft connected to a reduction motor, and a guard seat composed of a roller cam located on the other side of the driving shaft, and a turntable is provided on the opposite surface of the driving shaft and the roller cam.

[0007] A processing axis platform is provided between the rotating disks, and a stabilizing member is provided at the angle between the processing axis platform and the contact position of the rotating disks on both sides, and two sides of the stabilizing member are respectively closely attached to the processing axis platform and one side of the rotating disk.

[0008] As a further solution of the utility model, the stabilizing member is tightly fixed to the turntable and the processing axis platform through the positioning holes and the fixing positions respectively arranged on both sides.

[0009] As a further solution of the utility model, the stabilizing member is a hard solid ductile iron steel structure.

[0010] As a further solution of the utility model, a mounting hole is provided on the surface of the processing axis platform, and a fixing groove for fixing the processing workpiece is provided on the side of the processing axis platform.

[0011] As a further solution of the utility model, the processing shaft platform is a solid plate structure of aluminum alloy.

[0012] As a further solution of the utility model, the guard seat also includes fixed feet respectively arranged at the bottom of the driving shaft and the roller cam.

[0013] As a further solution of the present invention, the fixed foot seat is connected to the roller cam and the outer shell of the driving shaft by welding.

[0014] The beneficial effects of the utility model are as follows:

[0015] The high-precision four-axis turntable processing structure proposed in the utility model can be used to support the weight of the processing axis platform and the objects placed on the processing axis platform through two turntables arranged on the opposite sides of the roller cam and the driving shaft. In addition, a stabilizing member is provided at the joint angle between the processing axis platform and the turntables on both sides. The stabilizing member can further support the force points on both sides of the platform, so that the force of the rotating shaft body tends to be linear, thereby improving the processing accuracy. It is mainly used to avoid the position deviation of the workpiece caused by multiple installations of the workpiece, thereby causing poor precision of the workpiece. This four-axis turntable can process multiple surfaces of the product at one time through one clamping, without the need to re-clamp the workpiece, thereby ensuring that the processing error caused by human factors is large during the processing process, and the overall processing accuracy of the workpiece cannot be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model technical solution or the utility model technical solution in the prior art, the drawings required for use in the embodiments or the prior art descriptions will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model technical solution. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the various components of the toilet seat and the processing shaft platform in the utility model.

[0018] Figure 2 The diagram is a schematic diagram showing the positions of the turntable and the fixing member in the present invention, and an enlarged schematic diagram of the fixing member.

[0019] Figure 3 This is a schematic diagram of the disassembled structure of the utility model product.

[0020] [Main parts / assembly reference numerals]

[0021] Label name Label name 1 Guard Seat 2 Processing axis platform 10 Active shaft 20 Mounting holes 11 Roller Cam 21 Fixed slot 12 Gear motor 3 Fasteners 13 Fixed foot 30 Fixed position 14 Turntable 31 Positioning hole DETAILED DESCRIPTION

[0022] as follows:

[0023] Please see attached Figure 1-3 ,

[0024] The main structure includes a guard seat 1 which is composed of a driving shaft 10 connected to a reduction motor 12 (with a built-in high-precision position feedback encoding sensor and built-in brake), and a roller cam 11 located on the other side of the driving shaft 10. Turntables 14 are provided on the opposite sides of the driving shaft 10 and the roller cam 11. A processing axis platform 2 is provided between the turntables 14. A stabilizing member 3 is provided at the angle between the processing axis platform 2 and the contact position of the turntables 14 on both sides. The two sides of the stabilizing member 3 are respectively pressed against the processing axis platform 2 and one side of the turntable 14.

[0025] Here’s how it works:

[0026] In this solution, the turntable 14 added to the roller cam 11 of the guard seat 1 and the opposite side of the driving shaft 10, when the processing platform or the processing platform with heavy objects is set between the turntables 14 on both sides, the two sides will not have the problem of slight downward deviation, but will be limited by the aperture of the turntable 14, which not only ensures that the shaft bodies on both sides will not be deformed and damaged, but also ensures stability during high-speed rotation. In addition, the stabilizing member 3 set at the angle between the turntables 14 on both sides and the processing shaft platform 2 on one side (or both sides) further plays the role of supporting the processing shaft platform 2. The stabilizing member 3 cooperates with the locating holes 31 and the fixing positions 30 respectively set on both sides, and is tightly fixed to the turntable 14 and the processing shaft platform 2. The two sides of the stabilizing member 3 are tightly against the two sides of the turntable 14 and the processing shaft platform 2, and are fixed by the fixing positions 30 and the locating holes 31.

[0027] In addition, due to the clearance error of the reducer or the gear itself during the rotation of the turntable, the turntable generates a cumulative error during the rotation, which causes a certain precision error between the actual position and the theoretically reached position when the turntable stops, which is called mechanical error. This mechanical error cannot be eliminated. It has a lot to do with the machinery and the hardware accessories such as the reducer and bearings used. The worse the precision of the reducer, the worse the precision of the turntable. It is an amplification relationship. In order to ensure the high precision of the four-axis turntable, this patent adopts a closed-loop turntable control system, which can accurately feedback the real-time position data of the turntable spindle through the high-precision position feedback encoding sensor built into the turntable, and compare the feedback of the spindle motor encoder. The system automatically calculates and processes the position that the motor should eventually reach for compensation, thereby achieving the control requirements of the high-precision four-axis shaft. When the specified precision position is reached, the brake is applied through the internal brake system, thereby fundamentally ensuring that the four-axis turntable will not have a slight shaking of the turntable due to the large cutting force given to the turntable by the mechanical processing Z-axis, resulting in excessive machining precision errors.

[0028] A preferred embodiment of the present invention: the stabilizing member 3 is a hard solid ductile iron steel structure.

[0029] In order to further reduce the weight of the processing shaft platform 2 itself, it is set to a hard solid ductile iron steel structure, which not only has the function of supporting the processing shaft platform 2 and the turntable 14, but also has the characteristics of being light and not easy to deform.

[0030] A preferred embodiment of the present invention is as follows: a mounting hole 20 is provided on the surface of the processing axis platform 2, and a fixing groove 21 for fixing the processing workpiece is provided on the side of the processing axis platform 2.

[0031] A preferred embodiment of the present invention is that the processing shaft platform 2 is a solid plate structure of aluminum alloy.

[0032] The aluminum alloy solid plate structure is used as the processing shaft platform 2, which is light in weight, has high strength, is not easy to bend, and has simple replacement and assembly and disassembly procedures.

[0033] A preferred embodiment of the present invention: the guard seat 1 also includes fixed feet respectively arranged at the bottom of the driving shaft 10 and the roller cam 11.

[0034] In a preferred embodiment of the present invention, the fixed foot 13 is connected to the roller cam 11 and the outer shell of the driving shaft 10 by welding.

[0035] The above are only preferred embodiments of the technical solution of the utility model, and the patent scope of the technical solution of the utility model is not limited thereto. All equivalent structural changes made by using the contents of the technical solution description and drawings of the technical solution of the utility model under the conception of the technical solution of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the technical solution of the utility model.

Claims

1. A high-precision four-axis turntable processing structure, characterized in that: include The guard seat is composed of a driving shaft connected to a reduction motor and a roller cam located on the other side of the driving shaft. The driving shaft and the roller cam are both provided with a rotating disk on the opposite side. A processing axis platform is provided between the rotating disks, and a stabilizing member is provided at the angle between the processing axis platform and the contact position of the rotating disks on both sides, and two sides of the stabilizing member are respectively closely attached to the processing axis platform and one side of the rotating disk.

2. The high-precision four-axis turntable processing structure according to claim 1 is characterized in that: The stabilizing member is closely fixed to the turntable and the processing axis platform through the positioning holes and the fixing positions respectively arranged on both sides.

3. The high-precision four-axis turntable processing structure according to claim 1 is characterized in that: The stabilizing member is a hard solid ductile iron steel structure.

4. The high-precision four-axis turntable processing structure according to claim 1 is characterized in that: The surface of the processing axis platform is provided with a mounting hole, and the side of the processing axis platform is provided with a fixing groove for fixing the processing workpiece.

5. The high-precision four-axis turntable processing structure according to claim 1 is characterized in that: The processing axis platform is an aluminum alloy solid plate structure.

6. The high-precision four-axis turntable processing structure according to claim 1 is characterized in that: The guard seat also includes fixed feet which are respectively arranged at the bottom of the driving shaft and the roller cam.

7. The high-precision four-axis turntable processing structure according to claim 6 is characterized in that: The fixed foot seat is connected to the roller cam and the outer shell of the driving shaft by welding.

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