Adjustable cutter device for machining lead angle of external thread

Abstract

The invention discloses an adjustable cutter device for machining a lead angle of an external thread. The adjustable cutter device comprises a cutter bar, a turbine, a worm, a first bearing, a second bearing, a first limiting block, a second limiting block and a shell. The cutter bar is provided with a blade mounting end used for mounting the cutter blade and a cutter bar connecting end used for being connected with the shell; the connecting end of the cutter bar is installed in the shell through a first bearing and a second bearing, a turbine is fixed to the cutter bar and meshed with a worm, the worm is rotationally connected with the shell, and the end, located on the outer side of the shell, of the worm is a driving end. A first pressing plate and a second pressing plate are fixedly installed on the shell, a third pressing plate is fixedly installed on the second pressing plate, the first pressing plate is located on the outer side of the first bearing, and the third pressing plate is located on the outer side of the second bearing; the first limiting block abuts against the worm, and the second limiting block is in threaded connection with the second bearing. The device is simple in structure, parts are easy to machine, the manufacturing cost is low, and the lead angle precision is high.

Description

Technical Field

[0001] The invention relates to the technical field of lathe external thread processing, in particular to a cutter device with adjustable helical angle processing of external threads. Background Art

[0002] In mechanical processing, the tool bar for normal processing of external threads is a formed tool bar, and the blade is perpendicular to the square tool bar. When processing external threads with large pitch and a certain thread lead angle, there will be a large cutting force when processing the threads first, which has high requirements on the performance of the tool material, sharpening and installation, and it is necessary to perform irreversible angle processing on the tool (or make a one-time angle tooling installation to ensure it), and the technical requirements for workers are also high. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by this patent application is how to provide an adjustable cutting device for processing the helix angle of external threads, which is easy to clamp, has high positioning accuracy, can adjust the thread lead angle, is easy to process, and has high reliability, and is used for processing large-pitch external threads with different helix angles.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A cutter device for machining an external thread helix angle with an adjustable shape comprises a cutter bar, a turbine, a worm, a first bearing, a second bearing, a first limit block, a second limit block, a first pressing plate, a second pressing plate, a third pressing plate and a housing;

[0006] The knife bar is a multi-section shaft structure, and the knife bar has a blade mounting end for mounting a cutting blade and a knife bar connecting end for connecting to the housing; the knife bar connecting end is mounted in the housing through a first bearing and a second bearing, a turbine is fixed on the knife bar, the turbine is meshed with a worm, the worm is rotatably connected to the housing, and the end of the worm located outside the housing is a driving end; a first pressing plate and a second pressing plate are fixedly mounted on the housing, the third pressing plate is fixedly mounted on the second pressing plate, the first pressing plate is located outside the first bearing, and the third pressing plate is located outside the second bearing;

[0007] The first limit block and the second limit block are respectively located on a side of the turbine and the second bearing away from the blade mounting end, the first limit block abuts against the worm, and the second limit block is threadedly connected to the second bearing.

[0008] Wherein, a waist-shaped groove is arranged on the tool rod, a waist-shaped block is placed in the waist-shaped groove, and the turbine is connected to the tool rod through the waist-shaped block in the waist-shaped groove.

[0009] Among them, the reduction ratio between the turbine and the worm is 1:4.

[0010] Wherein, the driving end of the worm is provided with a hexagon socket screw hole.

[0011] The end surface of the driving end of the worm is engraved with scales of 0°--90° around it, indicating that the thread lead angle rotates 90° for every rotation of the worm.

[0012] Wherein, the first pressing plate and the second pressing plate are fixedly connected to the housing by screws, and the third pressing plate is fixedly connected to the second pressing plate by screws.

[0013] Wherein, two of the first limit blocks and two of the second limit blocks are provided.

[0014] In summary, the adjustable cutter device for processing the helix angle of external threads uses a hexagonal screwdriver to rotate the worm clockwise, the gear ratio of the worm gear is 1:4, the worm gear is rotated to drive the cutter body to rotate to the target angle, and then the housing is installed on the tool holder and the height is adjusted so that the center of the cutting blade is calibrated with the center of the part, and then the external thread processing is performed.

[0015] The structure is simple, the parts are easy to process, the manufacturing cost is low, and the thread lead angle accuracy is high, which expands the processing capacity of traditional ordinary equipment and reduces the production cost. It is worthy of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a cutter device for machining an adjustable helix angle of an external thread.

[0017] Figure 2 for Figure 1 sectional view of .

[0018] Figure 3 Schematic diagram of the worm gear.

[0019] Figure 4 for Figure 3 Schematic diagram of the drive end.

[0020] Figure 5 Schematic diagram of the tool bar.

[0021] Figure 6 This is a schematic diagram of the tool bar clamping. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "upper, lower" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0023] Example:

[0024] like Figure 1-6 As shown, a cutting device with adjustable helix angle for processing external threads comprises a cutter bar 1, a turbine 2, a worm 3, a first bearing 4, a second bearing 5, a first limit block 6, a second limit block 7, a first pressing plate 8, a second pressing plate 9, a third pressing plate 10 and a housing 11;

[0025] The knife bar 1 is a multi-section shaft structure, and has a blade mounting end for mounting a cutting blade 12 and a knife bar connecting end for connecting with a housing 11; the knife bar 1 is a modified ordinary knife bar;

[0026] The connecting end of the tool rod is installed in the outer shell 11 through the first bearing 4 and the second bearing 5. A turbine 2 is fixed on the tool rod 1. The turbine 2 is meshed with the worm 3. The worm 3 is rotatably connected to the outer shell 11, and the end of the worm 3 located on the outer side of the outer shell 11 is the driving end; the first pressure plate 8 and the second pressure plate 9 are fixedly installed on the outer shell 11, and the third pressure plate 10 is fixedly installed on the second pressure plate 9. The first pressure plate 8 is located on the outer side of the first bearing 4, and the third pressure plate 10 is located on the outer side of the second bearing 5; the three pressure plates 10 have the function of limiting and fixing the tool rod 1 in the inner cavity, so as to ensure that the tool rod 1 does not loosen or shake when processing parts.

[0027] The first limit block 6 and the second limit block 7 are respectively located on the side of the turbine 2 and the second bearing 5 away from the blade mounting end. The first limit block abuts against the worm, and the second limit block is threadedly connected to the second bearing.

[0028] During implementation, a waist-shaped groove is provided on the tool rod 1, a waist-shaped block is placed in the waist-shaped groove, and the turbine 2 is connected to the tool rod 1 through the waist-shaped block in the waist-shaped groove to limit their relative movement.

[0029] During implementation, the reduction ratio between the turbine 2 and the worm 3 is 1:4.

[0030] During implementation, the driving end of the worm 3 is provided with a hexagon socket screw hole so as to be rotatable.

[0031] During implementation, the end surface of the driving end of the worm 3 is engraved with scales of 0°--90° around a circle, indicating that the thread lead angle rotates 90° every time the worm 3 rotates one circle.

[0032] During implementation, the first pressing plate 8 and the second pressing plate 9 are fixedly connected to the housing 11 by screws, and the third pressing plate 10 is fixedly connected to the second pressing plate 9 by screws.

[0033] During implementation, two of the first limiting block 6 and the second limiting block 7 are provided, so as to play a double limiting role on the knife bar 1.

[0034] Embodiment 1:

[0035] Single piece and small batch parts processing with different external thread helix angles: Figure 6 In order to process external thread parts with specific thread lead angles, a product part is processed by installing an adjustable external thread spiral lead angle cutting tool device on a universal tool holder to realize the processing of parts on a machine tool.

[0036] In fact, the upper and lower positions of the cutter are adjusted by inserting a gasket at the bottom of the universal cutter holder, so that the cutter always maintains a horizontal position for part processing. It can quickly cope with the processing of external threads of parts with different thread lead angles. It only needs to adjust the worm to the correct thread lead angle position for installation and processing. If the traditional processing method is used, it will take a production cycle of 3-5 days to specially make a cutter bar with a fixed thread lead angle for processing, which greatly liberates productivity and is more suitable for part processing in the rhythm of modern production.

[0037] Embodiment 2:

[0038] Inclined hole processing of batch parts: For the external thread processing of batch large parts (large pitch parts), the traditional external thread processing uses an integrated tool bar to process the parts. Processing parts of different materials requires replacing tool bars of different materials for processing; this device ( Figure 5 ) It uses a cutter-type external thread processing, which has the characteristics of replaceable blades and does not wear the tool bar. Only one tool bar is needed to process parts of different materials. The blade is light and thin, which is convenient for storage and carrying, and can be replaced quickly. When processing special materials, special layer blades can be used for processing, which has a natural advantage over the integrated tool bar. Especially for the external thread processing of larger parts, the tool bar is heavier as a whole, and the difficulty of replacement greatly reduces the processing efficiency of the parts. In addition, the tip of the large parts is more worn. Often, the blade needs to be sharpened after processing 1-2 parts. Since the tool bar is heavy, it is more challenging for the skill level of the sharpening master. This device can greatly liberate productivity, can quickly replace and clamp parts, and improve the production efficiency of batch parts.

[0039] An adjustable external thread spiral angle cutting device has a simple structure, easy parts processing and manufacturing, low cost, adjustable angle, high positioning accuracy, strong applicability, and can greatly liberate productivity.

[0040] Finally, it should be noted that those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include these modifications and variations.

Claims

1. A cutting device for machining an adjustable helix angle of an external thread, characterized in that: It includes a cutter bar, a turbine, a worm, a first bearing, a second bearing, a first limit block, a second limit block, a first pressing plate, a second pressing plate, a third pressing plate and a housing; The knife bar is a multi-section shaft structure, and the knife bar has a blade mounting end for mounting a cutting blade and a knife bar connecting end for connecting to the housing; the knife bar connecting end is mounted in the housing through a first bearing and a second bearing, a turbine is fixed on the knife bar, the turbine is meshed with a worm, the worm is rotatably connected to the housing, and the end of the worm located outside the housing is a driving end; a first pressing plate and a second pressing plate are fixedly mounted on the housing, the third pressing plate is fixedly mounted on the second pressing plate, the first pressing plate is located outside the first bearing, and the third pressing plate is located outside the second bearing; The first limit block and the second limit block are respectively located on a side of the turbine and the second bearing away from the blade mounting end, the first limit block abuts against the worm, and the second limit block is threadedly connected to the second bearing.

2. The adjustable cutter device for processing the helix angle of external threads according to claim 1, characterized in that: The cutter bar is provided with a waist-shaped groove, a waist-shaped block is placed in the waist-shaped groove, and the turbine is connected to the cutter bar through the waist-shaped block in the waist-shaped groove.

3. The adjustable cutter device for processing the helix angle of external threads according to claim 2, characterized in that: The reduction ratio between the turbine and the worm is 1:

4.

4. The adjustable cutter device for processing the helix angle of external threads according to claim 1, characterized in that: The driving end of the worm is provided with a hexagon socket screw hole.

5. The adjustable cutter device for processing the helix angle of external threads according to claim 1, characterized in that: The end surface of the driving end of the worm is engraved with scales of 0°--90° around it, indicating that the thread lead angle rotates 90° for every rotation of the worm.

6. The adjustable cutter device for processing the helix angle of external threads according to claim 2, characterized in that: The first pressing plate and the second pressing plate are fixedly connected to the housing by screws, and the third pressing plate is fixedly connected to the second pressing plate by screws.

7. The adjustable cutter device for processing the helix angle of external threads according to claim 1, characterized in that: There are two of each of the first limiting blocks and the second limiting blocks.

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