Adjustable cutter device for machining lead angle of external thread

Abstract

The utility model 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 utility model relates to the technical field of lathe external thread processing, in particular to a cutter device with adjustable processing of the helical angle of the external thread. Background Art

[0002] In mechanical processing, the tool bar for normal processing of external threads is a formed tool bar, and the cutting edge 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 thread first, which has high requirements on the performance of the tool material, sharpening and installation, and the tool needs to be processed at an irreversible angle (or a one-time angle tooling installation must be made to ensure it), which also has high technical requirements on the workers. Utility Model Content

[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 cutting device with adjustable helix angle for processing external threads, comprising 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 via a first bearing and a second bearing, a turbine is fixed on the knife bar, the turbine is engaged 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 pressure plate and a second pressure plate are fixedly mounted on the housing, and the third pressure plate is fixedly mounted on the second pressure plate, the first pressure plate is located outside the first bearing, and the third pressure 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 provided on the cutter rod, a waist-shaped block is placed in the waist-shaped groove, and the turbine is connected to the cutter rod through the waist-shaped block in the waist-shaped groove.

[0009] 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 face of the driving end of the worm is engraved with scales from 0° to 90° around the periphery, indicating that the thread lead angle rotates 90° for each rotation of the worm.

[0012] 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 limiting blocks and two of the second limiting blocks are provided.

[0014] In summary, this adjustable cutter device for processing the helix angle of external threads uses a hexagonal screwdriver to rotate the worm clockwise, the worm gear transmission ratio is 1:4, and the worm is rotated to drive the cutter body to rotate to the target angle. Then the shell is installed on the tool holder and the height is adjusted to align the center of the cutting blade 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 production costs. It is worthy of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a cutter device with an adjustable helix angle for processing external threads.

[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 driving end.

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

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

[0022] The present invention is further described in detail below with reference to the accompanying drawings. In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional terms such as "upper, lower" and "top, bottom" are generally based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. Unless otherwise indicated, these directional terms 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 should not be understood as limiting the scope of protection of the present invention; the directional terms "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0023] Example:

[0024] like Figure 1-6 As shown, a cutting device with adjustable helix angle for processing external threads includes 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 to the housing 11; the knife bar 1 is a modified ordinary knife bar;

[0026] The connecting end of the tool rod is installed in the shell 11 through the first bearing 4 and the second bearing 5. A turbine 2 is fixed on the tool rod 1, and the turbine 2 is engaged with the worm 3. The worm 3 is rotatably connected to the shell 11, and the end of the worm 3 located on the outside of the shell 11 is the driving end; a first pressure plate 8 and a second pressure plate 9 are fixedly installed on the 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 outside of the first bearing 4, and the third pressure plate 10 is located on the outside of the second bearing 5; the three pressure plates 10 play a role of limiting and fixing the tool rod 1 in the inner cavity, ensuring 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 from 0° to 90° around the periphery, 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 blocks 6 and the second limiting blocks 7 are provided, which play a double limiting role on the knife bar 1.

[0034] Example 1:

[0035] Processing of single and small batch parts with different external thread helix angles: Figure 6 , a product part processes an external thread part with a specific thread lead angle, and an adjustable external thread spiral lead angle cutting tool device is installed on a universal tool holder to realize the processing of parts on a machine tool.

[0036] By inserting a shim at the bottom of the universal toolholder, the cutter's vertical position is adjusted, ensuring it remains horizontal during part processing. This allows for rapid processing of external threads on parts with varying lead angles. Simply adjust the worm to the correct lead angle and the machine is ready for installation. Traditional processing methods would require a 3-5-day production cycle, requiring specialized toolholders with fixed lead angles. This significantly improves productivity and adapts to the demands of modern production processes.

[0037] Example 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 changing tool bars of different materials for processing; this device ( Figure 5 ) It adopts cutter-type external thread processing, which has the characteristic of replaceable blades and does not wear the tool rod. Only one tool rod 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 rod. Especially for the external thread processing of larger parts, the tool rod is heavier as a whole, and the difficulty of replacement greatly reduces the processing efficiency of the parts. In addition, the tip of the tool for large parts wears more, and the blade needs to be sharpened after processing 1-2 parts. Since the tool rod is heavy, it is more challenging for the skill level of the sharpening master. This device can greatly liberate productivity, can quickly remove 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 modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A cutting device with adjustable helix angle for processing external threads, 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 pressure plate, a second pressure plate, a third pressure 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 via a first bearing and a second bearing, a turbine is fixed on the knife bar, the turbine is engaged 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 pressure plate and a second pressure plate are fixedly mounted on the housing, and the third pressure plate is fixedly mounted on the second pressure plate, the first pressure plate is located outside the first bearing, and the third pressure 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 rod 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 rod 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 face of the driving end of the worm is engraved with scales from 0° to 90° around the periphery, indicating that the thread lead angle rotates 90° every time the worm rotates one circle.

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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