Variable-angle high-frequency milling power head

Abstract

The utility model discloses an angle-variable high-frequency milling power head which comprises a base, a power head handle part and a rotary table, and the power head handle part is arranged on one side of the base and installed in a cutter position hole of a lathe; the rotary table is rotatably mounted on the base; a motor for driving the rotary table to rotate is arranged above the rotary table; and the motor drives the cutter through the cutter driving shaft. The B shaft end mounting device is simple in overall structure, small in occupied space, capable of being mounted at the back shaft end and the main shaft end, high in flexibility and capable of solving the problems that in the prior art, a B shaft is mounted at the back shaft end, mounting is not changed, using cost is high, and production efficiency is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe technical field especially relates to a variable angle high frequency milling power head. BACKGROUND

[0002] With the continuous progress of industrial technology, the shape of workpieces processed by CNC lathes is increasingly complex, and is no longer limited to traditional axisymmetric shapes, but includes non-axisymmetric features such as cross holes and inclined holes at different angles. In order to cope with these complex processing needs, lathe manufacturers have developed high-end CNC lathes with B-axis. The B-axis is a rotating shaft installed on the tool holder, which can install a power tool to realize milling and drilling inclined holes at different angles. This configuration makes CNC lathes have more powerful and flexible processing capabilities, especially suitable for processing complex workpieces with high added value, such as medical devices, complex valves, and engine fuel injectors. However, the existing B-axis technology has some significant shortcomings and deficiencies.

[0003] One reason is that lathes with B-axis configuration are high-end models, expensive, and most enterprises will not choose to purchase such top-of-the-line equipment if they do not have enough orders for high-value-added workpieces. Another is that due to system and other factors, existing mid-end lathe models usually cannot be upgraded to add B-axis functionality. Because the B-axis is large in size, it can usually only be configured at the main shaft end of the lathe, and the back shaft end cannot be configured with a B-axis due to space limitations. If inclined holes need to be processed at the back shaft end, although it is possible to install a tool in the direction of the B-axis towards the back shaft end, in this case, the processing at the back shaft end will occupy the time of the main shaft end, resulting in longer processing cycles for workpieces and reducing production efficiency.

[0004] Taking a fuel injector workpiece of our company as an example, it has three 33° inclined holes for oil injection, and the processing of these inclined holes is a difficult point. According to the process arrangement, these inclined holes need to be processed at the back shaft end to evenly distribute the processing load between the main shaft end and the back shaft end, thereby achieving a shorter processing cycle. However, our existing equipment does not have a B-axis, and the order quantity of this workpiece is not sufficient to support the purchase of a new device. Therefore, we can only split the machining process into two steps: first, process the blank without inclined holes on the lathe, and then process the inclined holes on the machining center equipment. This processing method not only has low production efficiency, but also causes large fluctuations in the relevant shape and position tolerances of the workpiece due to two clamping operations, resulting in poor quality. In addition, the power head of the B-axis usually uses a motor to drive a gear, and its maximum speed is generally not more than 6000 rpm. Since the diameter of the inclined hole is usually less than 3 mm, the processing line speed of the tool is limited by the speed, resulting in low processing efficiency. SUMMARY

[0005] The utility model discloses a high frequency mill power head of variable angle suitable for installing in back shaft end, to solve the inconvenient installation of B axis in back shaft end, high use cost, low processing efficiency in the foregoing background art, and the oblique hole of oil nozzle workpiece can be processed on lathe one time.

[0006] To realize the above-mentioned purpose, the utility model provides the following technical scheme is:

[0007] A high frequency mill power head of variable angle, including: base, power head handle part, revolving stage, the power head handle part sets up in one side of the base, and installs to the cutter position hole of lathe,

[0008] The revolving stage rotatablely installs on the base,

[0009] The motor that drives revolving stage rotation is provided with above the revolving stage,

[0010] The motor passes through the cutter driving shaft and drives cutter.

[0011] Preferably, locking plane is provided on the power head handle part, and the locking plane is towards directly above, to make the power cutter head and the bolt stable contact of lock cutter handle.

[0012] Preferably, after the power head handle part is installed to the cutter position hole, the size of the power head handle part leakage part does not exceed 80mm.

[0013] Preferably, the rotatable angle range of revolving stage is -120 to 120.

[0014] Preferably, the motor is located in the shell, and the compressed air interface for connecting compressed air pipe, the cable interface for connecting drive cable are provided on the shell.

[0015] Preferably, cutter locking nut is connected to the front end of the cutter driving shaft, and the cylinder clamp for clamping cutter is arranged in the cutter locking nut.

[0016] Preferably, the side of the cutter locking nut is provided with nut dismounting gap.

[0017] Preferably, angle scale is provided on the revolving stage.

[0018] The utility model has the advantages of:

[0019] The utility model relates to a variable angle high frequency milling power head, including base, power head handle part, revolving stage, power head handle part sets up at the one side of base, and installs to the cutter location hole of lathe, revolving stage rotatablely installs on base, and the motor that drives revolving stage rotation is provided with above revolving stage, and the motor drives the cutter through cutter driving shaft, and the whole structure is simple, and the space is small, not only can install in back axle end, also can install in main shaft end, and the flexibility is high, solves the problem that B axle installs in back axle end in prior art and has the problems of unchangeable installation, high use cost and low processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a variable angle high frequency milling power head structure schematic view of the utility model;

[0021] Figure 2 It is angle rotation schematic view of the variable angle high frequency milling power head shown;

[0022] The marks of each component in the drawing are as follows:

[0023] 1, base, 2, indicating scale, 3, revolving stage, 4, angle scale, 5, locking bolt, 6, power cutter handle part, 7, locking plane, 8, compressed air interface, 9, cable interface, 10, shell, 11, cutter locking nut, 12, cutter driving shaft, 13, nut dismounting gap. DETAILED DESCRIPTION

[0024] The preferred embodiments of the utility model are described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by the person skilled in the art, and the protection scope of the utility model is more clearly and explicitly defined.

[0025] Embodiment:

[0026] The utility model introduces a structure of a variable angle high frequency milling power head.

[0027] As Figure 1 Shown, Figure 1 It is a variable angle high frequency milling power head structure schematic view of the utility model. The variable angle high frequency milling power head includes: base 1, power head handle part 6, revolving stage 3, power head handle 6 is set on the side of base 1, and power head handle 6 is consistent with general drill handle, can be directly installed into the cutter location hole of existing lathe, wherein when installing, power head handle 6 is as much as possible to the cutter location hole and is installed, so that the overhanging of the exposed power head handle part is short, and the overhanging part is less than 80 mm, so that enough aperture is left for the movement of back axle without causing interference.

[0028] Revolving stage 3 is rotatably installed on base 1, and the motor that drives revolving stage 3 rotation is provided above revolving stage 3, and the motor drives the cutter through cutter driving shaft 12.

[0029] In the preferred embodiment, an angle scale 4 is provided on the rotary table 3, and an indication scale 2 is provided on the base, to assist in the rotation of the rotary table angle, ensure the accuracy of the scale, and prevent the rotary table angle from deviating. Figure 2 Figure 2 is a schematic diagram of the angle rotation of a variable angle high-frequency milling power head. The rotary table 3 can be rotated at an angle of -120° to 120°, and the single grid can be adjusted to an accuracy of 0.5°, meeting the requirements of angle fine adjustment and being suitable for the machining of most other inclined holes and other features, with good flexibility and better applicability than the B-axis of a lathe.

[0030] In the preferred embodiment, the base 1 is L-shaped, the rotary table 3 is located on the platform of the base 1, and the power head handle 6 is located on the side of the base 1. A locking bolt 5 for locking the rotary table is provided on the base, and the locking bolt 5 is located below the power head handle 6. After the rotary table is adjusted to a certain angle, the position of the scale line is checked to ensure that it corresponds, and then the locking bolt is inserted to lock the rotary table and fix the angle.

[0031] In order to stably install the power tool handle into the tool position inner hole, a locking plane 7 is provided on the power head handle 6, which faces directly upwards. When installing, the bolts of the tool handle are screwed into contact with the locking plane 7, and are tightened one by one, so that the power tool and the bolts of the tool handle are in stable contact.

[0032] The motor is located in the housing 10, and a compressed air interface 8 for connecting a compressed air pipe and a cable interface 9 for connecting a driving cable are provided on the housing 10. The motor drives the tool driving shaft 12, and the tool locking nut 11 is connected to the front end of the tool driving shaft 12. The tool locking nut 11 is provided with a chuck for clamping the tool. The corresponding round handle tool is placed in the chuck in the tool locking nut 11, and a nut disassembly gap 13 is provided on the side of the tool locking nut 11. After the round handle tool is placed in the chuck, two open spanners are inserted into the nut disassembly gap 13 and the gap on the tool driving shaft 12 to lock.

[0033] In the utility model, the motor drives the tool, compared with the B-axis power head in the prior art which adopts the motor driving gear driving mode, the speed is higher, the highest speed of the B-axis is generally not more than 6000 rpm, while the motor speed for driving the tool in the utility model is as high as 80000 rpm (and the speed can be adjusted). In combination with the use of hard alloy coated tools, faster cutting parameters are selected, and the production efficiency can reach a high level.

[0034] The use of the variable angle high-frequency milling power head is described below in combination with the drawings:

[0035] ​Install the power head: After clearing a tool position on the lathe drill headstock, insert the power head handle 6 into the tool position hole. Make sure the installation depth is appropriate, and try to install it as deep as possible to make the protruding part shorter. The protruding part should not exceed 80mm.

[0036] Fix the power head: Rotate the power head handle 6 so that the locking plane 7 faces straight up, and tighten the locking screw of the handle.

[0037] Check the installation accuracy: Remove the tool locking nut 11, and use the needle of a runout gauge to contact the outer diameter of the tool drive shaft 12. Make sure the runout deviation of the tool drive shaft is not more than 0.005.

[0038] Adjust the angle: Rotate the rotary table 3 to the desired angle, and lock the locking screw 5 on the rotary table. For example, if you need to drill a 330-degree inclined hole, rotate the rotary table 3 so that the scale points to 330, then lock the locking screw 5 on the rotary table. After locking, check the position of the scale again to ensure that it has not deviated.

[0039] Check for interference: In manual mode, check if the moving parts of the device collide with the power head. If necessary, adjust the tool position.

[0040] Install the tool: Place the round handle tool into the collet of the tool locking nut 11, and lock it with an open wrench.

[0041] Connect compressed air and cable: Connect the compressed air pipe and the drive cable to the corresponding interfaces.

[0042] Adjust the cutting oil: Adjust the cutting oil pipe of the lathe so that the nozzle is aligned with the tool edge.

[0043] Complete the installation: Perform the usual programming, machine adjustment, and start-up steps.

[0044] The utility model discloses a lathe based on prior art, designed to suit the installation at its back shaft end power head, this power head structure will not increase additional production cost, also will not like prior art B axis installation at the back shaft end when processing occupies the time of main shaft end, leads to the processing tempo of workpiece to be long, the utility model discloses can let oil jet nozzle once on lathe processing inclined hole, to speed up the tempo to improve production efficiency, and let the shape tolerance of inclined hole stable and keep at good level. Through more than a year's statistics, after applying this variable angle high frequency milling power head, the oil jet nozzle workpiece of our company can be processed on the lathe once, the processing steps are simplified, and the statistics show that the tempo and efficiency are improved by about 30% than the previous scheme; in terms of quality, because the process is integrated into a device, it is no longer necessary to clamp and process twice, and the shape tolerance fluctuation of the inclined hole is better than before by an order of magnitude.

[0045] The power head structure is compact in overall structure and small in occupied space.

[0046] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the utility model specification and the attached drawing contents, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. A variable angle high frequency milling power head, characterized by, Comprise: Base (1), power head handle (6), rotary table (3), the power head handle (6) is arranged in one side of the base (1), and is installed to the tool rest hole of lathe; The rotary table (3) is rotatably installed on the base (1); A motor for driving the rotary table (3) is arranged above the rotary table (3); The motor drives the tool through a tool driving shaft (12).

2. The variable angle high frequency milling power head of claim 1, wherein: A locking plane (7) is arranged on the power head handle (6), and the locking plane (7) faces directly upwards.

3. The variable angle high frequency milling power head of claim 1, wherein: After the power head handle (6) is installed to the tool rest hole, the size of the leakage part of the power head handle (6) is not more than 80mm.

4. The variable angle high frequency milling power head of claim 1, wherein: The rotary table (3) can rotate in the angle range of-120° to 120°.

5. The variable angle high frequency milling power head of claim 1, wherein: The motor is located in a shell (10), and a compressed air interface (8) for connecting a compressed air pipe and a cable interface (9) for connecting a driving cable are arranged on the shell (10).

6. The variable angle high frequency milling power head of claim 1, wherein: A tool locking nut (11) is connected to the front end of the tool driving shaft (12), and a collet for clamping a tool is arranged in the tool locking nut (11).

7. A variable angle high frequency milling power head as defined in claim 6, wherein: A nut dismounting gap (13) is arranged on the side of the tool locking nut (11).

8. The variable angle high frequency milling power head of claim 1, wherein: An angle scale (4) is arranged on the rotary table (3).

9. The variable angle high frequency milling power head of claim 1, wherein: An indication scale (2) is arranged on the base (1).

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