Internal and external finish-milling mechanism for mandrel

Abstract

The utility model discloses a mandrel inside and outside finish milling mechanism which comprises a pneumatic positioning pressing plate, the two sides of the lower end of the pneumatic positioning pressing plate are installed and fixed through installation blocks, and a side L-shaped positioning block used for conducting side face pneumatic positioning on a mandrel workpiece in the finish milling process is arranged on the inner side of the installation block at one end of the lower end face of the pneumatic positioning pressing plate. The external chain conveying line provided with the mandrel carrier plate is arranged at the bottom of the pneumatic positioning pressing plate, a mandrel workpiece is conveyed to the inner side of the positioning frame plate to enable the pneumatic positioning pressing plate to move downwards pneumatically, the mandrel workpiece and the mandrel carrier plate can be positioned in the positioning frame plate, and the workpiece needing internal and external finish milling is made to enter a finish milling hole groove initially. And a milling cutter on the brushless motor on the motor mounting shaft can be positioned in the finish-milling hole groove, so that the mechanical arm drives the milling cutter to move in a limited range in the finish-milling hole groove to perform internal and external finish-milling on the mandrel workpiece, the movement range of the milling cutter is limited, and the internal and external finish-milling quality of the mandrel workpiece is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spindle precision milling equipment, and in particular relates to a spindle internal and external precision milling mechanism. Background Art

[0002] Automobile seat belts are usually composed of a core shaft, a return spring, a frame, and a seat belt. The core shaft is rotatably connected to the frame, and the seat belt is passed through the core shaft. The fine milling of the core shaft has the characteristics of similar shapes, different specifications, and a large number. In addition, each series of core shafts is divided into multiple specifications with the same shape and only different diameters. Auxiliary fixtures are made separately, which not only causes waste, but also leads to too many repetitive operations such as replacing the fixture, re-aligning, and setting the tool each time.

[0003] To this end, a multi-station CNC milling spindle quick clamping platform with a bulletin number of "CN216263684U" belongs to the field of mechanical processing technology. The clamping platform includes a base, a locking block, a stopper, a fastening bolt, an adjusting bolt, a fixed shaft and a fixing plate. The clamping platform described in the utility model has multiple stations and is expandable, and can solve the clamping and processing problems of multiple parts at one time; and the relative position of the base and the machine tool has been determined, so to process workpieces of different specifications, it is only necessary to replace fixed shafts of different diameters without the need for re-alignment; in addition, the base replaces the vise for fixing, saving the processing cost of the clamping chuck, making the operation more convenient and improving production efficiency.

[0004] However, for the above-mentioned multi-station CNC milling spindle quick clamping platform, although the workpiece and the fixed shaft are assembled and fixed in the base of the platform, the adjusting bolt on the stop block is tightened to make the locking block jam into the annular groove of the fixed shaft to prevent rotation, the following obvious defects still exist during use: However, in the process of using the milling cutter to perform internal and external fine milling on the workpiece, since there is no positioning frame groove structure to limit the range of the internal and external fine milling surfaces of the workpiece, it is easy for the milling cutter to exceed the range of internal and external fine milling during the internal and external fine milling of the workpiece, thereby causing errors in the internal and external fine milling of the workpiece. Utility Model Content

[0005] The utility model aims to provide a spindle internal and external precision milling mechanism to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spindle internal and external fine milling mechanism, comprising:

[0007] A pneumatic positioning platen, both sides of the lower end of the pneumatic positioning platen are fixed and installed by mounting blocks, the inner side of the mounting block at one end of the lower end surface of the pneumatic positioning platen is provided with a side L-shaped positioning block for side pneumatic positioning of the spindle workpiece during fine milling, one side of the side L-shaped positioning block and located at the bottom side of the pneumatic positioning platen is provided with a positioning frame plate for covering and positioning the spindle workpiece in chain circulation transportation, and a fine milling hole groove is penetrated at the position of the inner side surface of the positioning frame plate corresponding to the pneumatic positioning platen;

[0008] The motor installation shaft has a mechanical arm at its upper end for adjusting the position of the motor installation shaft and performing fine milling of the inner and outer sides of the core shaft workpiece. The mechanical arm is installed on a vertical plate arranged on one side of the pneumatic positioning platen.

[0009] Preferably, the vertical bottom end of the positioning frame plate is provided with a mandrel carrier plate installed on an external chain conveyor line for cyclically conveying the mandrel workpiece. The mandrel workpiece can be cyclically conveyed to the bottom side of the positioning frame plate by the conveying chain with the mandrel carrier plate for pneumatic positioning.

[0010] Preferably, both ends of the lower end surface of the pneumatic positioning plate are fixed with lifting cylinders, and the lifting cylinders are fixed to the upper end surface of the mounting block, so that the pneumatic positioning plate can use the lifting cylinders to position and cancel the positioning of the core shaft workpiece.

[0011] Preferably, a mounting plate is provided on the inner side of the mounting block, and a positioning cylinder is provided at the end of the mounting plate, which can pneumatically position the core shaft workpiece in the positioning frame plate to reduce shaking during fine milling.

[0012] Preferably, a positioning groove for positioning the side of the positioning frame plate is provided at the outwardly extending end of the upper end of the side L-shaped positioning block, and a positioning column is longitudinally symmetrically provided on one side of the side L-shaped positioning block. The positioning column can be pneumatically pushed to pneumatically position the core shaft workpiece inside the positioning frame plate to reduce shaking.

[0013] Preferably, the other side of the side L-shaped positioning block is provided with a push plate with an L-shaped structure, and one side surface of the downwardly extending end of the push plate is fixed on the piston rod of the positioning cylinder, which can push the side L-shaped positioning block to perform reciprocating telescopic movement.

[0014] Compared with the prior art, the technical effects and advantages of the utility model are as follows: the internal and external fine milling mechanism of the core shaft, through the coordinated use of the pneumatic positioning plate, the pneumatic positioning plate storage rod positioning frame plate and the fine milling hole groove, and the lifting cylinder, makes the external chain conveyor line equipped with the core shaft carrier plate be set at the bottom of the pneumatic positioning plate, and the core shaft workpiece is conveyed to the inner side of the positioning frame plate to make the pneumatic positioning plate pneumatically move down, so that the core shaft workpiece and the core shaft carrier plate can be positioned inside the positioning frame plate, so that the workpiece that needs to be finely milled inside and outside can be placed in the fine milling hole groove in early summer, and the milling cutter on the brushless motor on the motor mounting shaft can be placed in the fine milling hole groove, so that the mechanical arm drives the milling cutter to move within a limited range in the fine milling hole groove to perform internal and external fine milling on the core shaft workpiece, thereby realizing the limitation of the moving range of the milling cutter, ensuring that the core shaft workpiece will not have the problem of movement range offset during the internal and external fine milling process, resulting in errors after the internal and external fine milling of the core shaft workpiece, and further improving the quality of the internal and external fine milling of the core shaft workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0017] Figure 3 This is a schematic diagram of the structure of the pneumatic positioning pressure plate of the utility model.

[0018] In the figure: 1. Pneumatic positioning plate; 2. Mounting block; 3. Side L-shaped positioning block; 4. Positioning frame plate; 5. Motor mounting shaft; 6. Robotic arm; 7. Vertical plate; 8. Mandrel carrier plate; 9. Lifting cylinder; 10. Mounting plate; 11. Positioning cylinder; 12. Positioning column; 13. Push plate; 14. Fine milling hole groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: a spindle internal and external precision milling mechanism, comprising:

[0021] Pneumatic positioning plate 1, the two sides of the lower end of the pneumatic positioning plate 1 are installed and fixed by mounting blocks 2, the mounting blocks 2 are fixed on both sides of the mandrel chain conveyor, and the pneumatic positioning plate 1 is placed at the upper end of the line conveyor, so as to limit the positioning frame plate 4, and the inner side of the mounting block 2 at one end of the lower end surface of the pneumatic positioning plate 1 is provided with a side L-shaped positioning block 3 for side pneumatic positioning of the mandrel workpiece during the fine milling process, and the side L-shaped positioning block 3 can clamp one end of the positioning frame plate 4 on the inner side of the device for positioning, and insert the positioning column 12 to The mandrel workpiece is positioned in the positioning frame plate 4. A positioning frame plate 4 for covering and positioning the mandrel workpiece in the chain circulation conveyance is provided on one side of the side L-shaped positioning block 3 and located at the bottom side of the pneumatic positioning plate 1. The positioning frame plate 4 is used to convey the mandrel workpiece conveyed by the chain to the positioning frame plate 4 for positioning and then move it downward for positioning and stability. A precision milling hole groove 14 is penetrated at the position of the pneumatic positioning plate 1 corresponding to the inner side surface of the positioning frame plate 4, so that the milling cutter tool can perform internal and external precision milling in the precision milling hole groove 14 within a limited range to avoid the phenomenon of the milling cutter being offset.

[0022] The motor mounting shaft 5 is provided with a mechanical arm 6 at the upper end thereof for adjusting the position of the motor mounting shaft 5 for fine milling of the inner and outer sides of the core shaft workpiece, and a mechanical arm mounting seat is installed at the connection and mounting position of the mechanical arm 6 and the vertical plate 7, the mechanical arm 6 is installed on the vertical plate 7 arranged on one side of the pneumatic positioning plate 1, and a bottom plate for mounting and fixing the mechanical arm 6 is provided at the bottom of the vertical plate 7, a brushless motor is fixed at the bottom of the motor mounting shaft 5 on the mechanical arm 6, and a milling cutter for fine milling of the inner and outer sides of the core shaft workpiece is installed on the rotating shaft of the brushless motor The vertical bottom end of the positioning frame plate 4 is provided with a core shaft carrier plate 8 installed on an external chain conveyor line for cyclically conveying the core shaft workpiece. The core shaft carrier plate 8 is installed on the external chain conveyor line, and the pneumatic positioning platen 1 arranged on the chain conveyor line is positioned at the position of the positioning frame plate 4, which is used to convey and position the core shaft workpiece one by one for internal and external fine milling. Lifting cylinders 9 are fixed at both ends of the lower end surface of the pneumatic positioning platen 1, which can move the pneumatic positioning platen 1 up and down, and the lifting cylinder 9 is fixed on the upper end surface of the mounting block 2.

[0023] A mounting plate 10 is provided on the inner side of the mounting block 2, which can enable the pneumatic positioning plate 1 to be installed at a specified position to press down the core shaft workpiece for positioning. A positioning cylinder 11 is provided at the end of the mounting plate 10, and the piston rod of the positioning cylinder 11 is used to push the push plate 13 to the right to move. The outwardly extending end of the upper end of the side L-shaped positioning block 3 is provided with a positioning groove for positioning the side of the positioning frame plate 4. The side L-shaped positioning block 3 can be positioned on one side of the positioning frame plate 4, and the positioning column 12 can be inserted into the positioning frame plate 4 to maintain a stable position for positioning the core shaft workpiece. To position the shaft workpiece, one side of the side L-shaped positioning block 3 is longitudinally symmetrically provided with positioning columns 12, and the positioning columns 12 are penetrated with insertion holes at the positions corresponding to the positioning frame plates 4, and the other side of the side L-shaped positioning block 3 is provided with a push plate 13 with an L-shaped structure, which can push the side L-shaped positioning block 3 toward one side of the positioning frame plate 4 and insert it into the positioning frame plate 4, and one side of the downwardly extending end of the push plate 13 is fixed on the piston rod of the positioning cylinder 11, so as to realize the positioning of the core shaft workpiece in the positioning frame plate 4, so that the milling cutter can accurately perform internal and external fine milling on the core shaft workpiece.

[0024] Specifically, when in use, firstly, the pneumatic positioning platen 1 is mounted on the vertical upper end of the position where the chain conveyor line is installed by using the cooperation of the mounting block 2 and the lifting cylinder 9, and at the same time, the mandrel carrier plate 8 is evenly fixed on the chain conveyor line to uniformly transport the mandrel workpiece to the corresponding bottom end of the positioning frame plate 4, and then the mounting plate 10 is fixed on one side of the mounting block 2, the positioning cylinder 11 is horizontally fixed on the upper end of the mounting plate 10, and the push plate 13 is installed on the piston rod of the positioning cylinder 11, and then the side L-shaped positioning block 3 is fixed on one end of the push plate 13, and the positioning cylinder 11 pushes the push plate 13 to move. The push plate 13 drives the side L-shaped positioning block 3 and the positioning frame plate 4 to move. At this time, the lifting cylinder 9 drives the pneumatic positioning pressure plate 1 to move downward, so that the positioning frame plate 4 moves down and the positioning cover is connected to the core shaft carrier plate 8, so as to limit the core shaft workpiece to the inside of the fine milling hole groove 14. Finally, the robot arm 6 works to drive the milling cutter to move within the existing range in the fine milling hole groove 14 to perform inside and outside fine milling on the core shaft workpiece, so as to achieve the milling cutter will not exceed the range during the mobile fine milling, reduce the dimensional error of the core shaft workpiece during the inside and outside fine milling, and further improve the quality of the inside and outside fine milling of the core shaft workpiece.

[0025] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spindle internal and external fine milling mechanism, characterized in that: include: A pneumatic positioning plate (1), wherein both sides of the lower end of the pneumatic positioning plate (1) are fixedly mounted by mounting blocks (2), and a side L-shaped positioning block (3) for performing side pneumatic positioning of a spindle workpiece during fine milling is provided on the inner side of the mounting block (2) at one end of the lower end surface of the pneumatic positioning plate (1), and a positioning frame plate (4) for covering and positioning the spindle workpiece during chain circulation is provided on one side of the side L-shaped positioning block (3) and located at the bottom side of the pneumatic positioning plate (1), and a fine milling hole groove (14) is penetrated at the position of the inner side surface of the positioning frame plate (4) corresponding to the pneumatic positioning plate (1); A motor mounting shaft (5) is provided at the upper end of the motor mounting shaft (5) with a mechanical arm (6) for adjusting the position of the motor mounting shaft (5) and performing fine milling on the inside and outside of a core shaft workpiece, and the mechanical arm (6) is mounted on a vertical plate (7) arranged on one side of a pneumatic positioning platen (1).

2. A spindle internal and external fine milling mechanism according to claim 1, characterized in that: The vertical bottom end of the positioning frame plate (4) is provided with a mandrel carrier plate (8) installed on an external chain conveyor line for cyclically conveying the mandrel workpiece.

3. The spindle internal and external fine milling mechanism according to claim 1, characterized in that: Both ends of the lower end surface of the pneumatic positioning plate (1) are fixed with lifting cylinders (9), and the lifting cylinders (9) are fixed on the upper end surface of the mounting block (2).

4. The spindle internal and external fine milling mechanism according to claim 1, characterized in that: A mounting plate (10) is provided on the inner side of the mounting block (2), and a positioning cylinder (11) is provided at the end of the mounting plate (10).

5. The spindle internal and external fine milling mechanism according to claim 1, characterized in that: The outwardly extending end of the upper end of the side L-shaped positioning block (3) is provided with a positioning groove for positioning the side of the positioning frame plate (4), and a positioning column (12) is longitudinally symmetrically provided on one side of the side L-shaped positioning block (3).

6. The spindle internal and external fine milling mechanism according to claim 4, characterized in that: The other side of the side L-shaped positioning block (3) is provided with a push plate (13) with an L-shaped structure, and a side surface of a downwardly extending end of the push plate (13) is fixed on the piston rod of the positioning cylinder (11).

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