Thread rolling device

Abstract

The utility model discloses a thread rolling device which comprises a chuck, a thread rolling wheel assembly and a conversion assembly. The chuck can clamp a workpiece and is connected with a driving source; the thread rolling wheel assembly comprises a base and two thread rolling wheels, and the two thread rolling wheels are connected with the base through connecting arms; the conversion assembly comprises an annular disc and a center wheel, the annular disc is rotatably arranged, a plurality of installation grooves communicating with the inner side and the outer side are formed in the annular disc in the circumferential direction, the base is slidably connected into the installation grooves, the center wheel is fixedly arranged on the inner side of the annular disc, the size of the center wheel is smaller than the inner circle of the annular disc, a push block is arranged on the center wheel, and the end, close to the center wheel, of the base is provided with an inclined face. The push block can abut against the inclined face and push the base to slide in the installation groove. By means of the thread rolling device, the thread rolling wheels with the multiple thread pitches are preset, the thread rolling device can be suitable for machining threads with different thread pitches, when the thread rolling device is used, only the annular disc needs to be rotated, the corresponding thread rolling wheels can be rotated to the machining positions and stretch out, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of thread processing, in particular to a thread rolling device. Background Art

[0002] Thread rolling is a processing method that uses a forming rolling die to plastically deform the workpiece to obtain threads. It has the advantages of surface roughness, full tooth shape, and high processing efficiency. It is suitable for mass production of external threads of standard fasteners and other threaded connections.

[0003] In the existing technology, rolling machines usually use two threaded rolling wheels to extrude the parts to be processed. Although the two rolling wheels can adjust the relative distance to meet the processing of workpieces with different diameters, they can only be used for processing a single pitch and have certain limitations. If workpieces with different pitches need to be processed, the rolling wheels need to be replaced, affecting the processing efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention proposes a thread rolling device that can quickly replace the thread rolling wheel for processing.

[0005] In order to achieve the above-mentioned purpose, the present utility model is implemented through the following technical solutions: a thread rolling device, including a chuck, a rolling wheel assembly and a conversion assembly;

[0006] The chuck is capable of clamping a workpiece and is connected to a driving source;

[0007] The thread rolling wheel assembly includes a base and two thread rolling wheels, and the two thread rolling wheels are connected to the base through a connecting arm;

[0008] The conversion assembly includes an annular disk and a center wheel. The annular disk is rotatably arranged and has a plurality of mounting grooves connecting the inner and outer sides around the circumference. The base is slidably connected in the mounting groove. The center wheel is fixedly arranged on the inner side of the annular disk and is smaller than the inner circle of the annular disk. A push block is provided on the center wheel. An end of the base close to the center wheel is provided with an inclined surface. The push block can abut against the inclined surface and push the base to slide in the mounting groove.

[0009] To use the machine, first rotate the annular disc relative to the center wheel. The push block, in contact with the inclined surface of the base, pushes the base outward within the mounting slot, pushing the two thread rolling wheels on the base out of the annular disc. The workpiece is then secured to the chuck and machining begins. The chuck rotates the workpiece and moves it axially, rolling the threads between the two rolling wheels.

[0010] The beneficial effect of the above-mentioned thread rolling device is that by presetting rolling wheels with multiple pitches, it can be suitable for thread processing with different pitches. When in use, it is only necessary to rotate the annular disk to rotate the corresponding rolling wheel to the processing position and extend it, thereby improving the processing efficiency.

[0011] Furthermore, a limit block is provided on the inner wall of the outer end of the installation groove, and the base can abut against the limit block.

[0012] The push block pushes the base outward until the other end of the base abuts against the limit block, and the base can be clamped and fixed from both ends to ensure its processing stability.

[0013] Furthermore, a sliding groove is provided on the inner wall of the installation groove along the sliding direction of the base, the base is slidably connected to the sliding groove, and both ends can respectively abut against both ends of the sliding groove.

[0014] The slide groove can limit the movement stroke of the base in the installation groove, can cooperate with the limit block and the push block to clamp the base, and can prevent the base from sliding from the inside.

[0015] Furthermore, a plurality of slidingly connected slot covers are provided on the outer wall of the annular disk around the circumference, and the slot covers can close the installation slots.

[0016] For unused thread rolling wheel assemblies, the corresponding mounting slots can be closed with slot covers to ensure cleanliness and prevent the thread rolling wheel from being damaged.

[0017] Furthermore, a gear ring is circumferentially provided on the outer side of the annular disk, and the conversion assembly further comprises a conversion motor and a drive gear, wherein the conversion motor is connected to the drive gear, and the drive gear is meshed with the gear ring.

[0018] When switching the thread rolling wheel assembly, the switching motor is started to drive the driving gear to rotate, and the driving gear drives the gear ring and the annular disk to rotate, so that different thread rolling wheel assemblies can be switched. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0020] Figure 1 A front view of a thread rolling device provided in one embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A side view of a thread rolling wheel assembly and a conversion assembly of a thread rolling device is shown;

[0022] Figure 3 for Figure 2A partially enlarged schematic diagram of a thread rolling device is shown;

[0023] Reference numerals:

[0024] 10-chuck;

[0025] 20-rolling wheel assembly, 21-base, 22-rolling wheel;

[0026] 30-conversion assembly, 31-annular disk, 311-mounting slot, 312-limiting block, 313-slide slot, 314-gear ring, 32-center wheel, 321-push block, 33-slot cover, 331-slide rail, 34-conversion motor, 341-drive gear. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0028] See also Figures 1 to 3 The utility model provides a thread rolling device, including a chuck 10, a rolling wheel assembly 20 and a conversion assembly 30. The chuck 10 fixes the workpiece, and the conversion assembly 30 selects the corresponding rolling wheel assembly 20 to start processing.

[0029] Specifically, the chuck 10 is capable of clamping a workpiece and is connected to a drive source. Each rolling wheel assembly 20 includes a base 21 and two rolling wheels 22, and the two rolling wheels 22 are connected to the base 21 through a connecting arm. The conversion assembly 30 includes an annular disk 31 and a center wheel 32. The annular disk 31 is rotatably arranged and has a plurality of mounting grooves 311 connecting the inner and outer sides around the circumference. The base 21 is slidably connected in the mounting groove 311. The center wheel 32 is fixedly arranged on the inner side of the annular disk 31 by an external mechanism (not shown in the figure) and is smaller than the inner circle of the annular disk 31. A push block 321 is provided on the center wheel 32. The base 21 is provided with an inclined surface at one end close to the center wheel 32. The push block 321 can abut against the inclined surface and push the base 21 to slide in the mounting groove 311. After being pushed to the extreme position, the push block 321 can fit with the end of the base 21.

[0030] During operation, the annular disk 31 is first rotated relative to the center wheel 32. As the push block 321 contacts the inclined surface of the base 21, it pushes the base 21 outward within the mounting groove 311, pushing the two thread rolling wheels 22 on the base to the outside of the annular disk 31. The workpiece is then secured to the chuck 10 and machining can begin. The drive source drives the chuck 10 to rotate and move the workpiece axially, rolling threads onto the workpiece between the two thread rolling wheels 22.

[0031] In this embodiment, the drive source includes a motor for rotating the workpiece and a hydraulic cylinder for axial movement. This is prior art and will not be further elaborated here. Furthermore, the two thread rolling wheels can be connected to the base in a manner where one is fixed and the other is rotatable, allowing for adjustable spacing between the two rolling wheels and adapting to workpieces of varying diameters.

[0032] Specifically, a stopper 312 is provided on the inner wall of the outer end of the mounting groove 311, and the base 21 can abut against the stopper 312. After the push block 321 pushes the base 21 outward, the other end of the base can abut against the stopper 312, thereby clamping and fixing the base from both ends to ensure its processing stability.

[0033] The inner wall of the mounting groove 311 is further provided with a sliding groove 313 along the sliding direction of the base 21. The base 21 is slidably connected to the sliding groove 313, and its two ends can respectively abut against the two ends of the sliding groove 313. The sliding groove 313 limits the movement of the base within the mounting groove 311, which can not only cooperate with the limit block 312 and the push block 321 to clamp the base 21, but also prevent the base from sliding out of the interior.

[0034] In this embodiment, a plurality of slidably connected slot covers 33 are circumferentially disposed on the outer wall of the annular disk 31. Slide rails 331 are provided on the outer wall of the annular disk 31. The slot covers 33 are slidably connected to the slide rails 331 and are capable of sealing the mounting slots 311. When the thread rolling wheel assembly 20 is not in use, the slot covers 33 can be used to close the corresponding mounting slots 311, ensuring that the thread rolling wheel 22 is clean and protected from damage.

[0035] Specifically, a ring gear 314 is circumferentially disposed on the outer side of the annular disk 31. The conversion assembly 30 also includes a conversion motor 34 and a drive gear 341. The conversion motor 34 is connected to the drive gear 341, and the ring gear 314 meshes with the drive gear 341. When switching between the thread rolling wheel assemblies 20, the conversion motor 34 is activated to rotate the drive gear 341, which in turn rotates the ring gear 314 and the annular disk 31, thereby switching between different thread rolling wheel assemblies 20.

[0036] The working principle of the thread rolling device described above is as follows: before processing, the conversion motor 34 is first started, which drives the annular disk 31 to rotate relative to the center wheel 32 via the drive gear 341 and the ring gear 314, causing the push block 321 to push the base 21 outward within the mounting groove 311, pushing the two thread rolling wheels 22 on the base 21 to the outside of the annular disk 31. Under the action of the slide groove 313, the limit block 312, and the push block 321, the base 21 is fixed in the current position. The workpiece is then fixed to the chuck 10 to begin processing. The chuck 10 drives the workpiece to rotate and move along its axial direction, and the workpiece is threaded between the two thread rolling wheels 22.

[0037] By using the above-mentioned thread rolling device, rolling wheels with multiple pitches can be preset to suit thread processing with different pitches. When in use, only the annular disk needs to be rotated to select the corresponding rolling wheel to the processing position, thereby greatly improving the processing efficiency.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A thread rolling device, characterized in that: Includes chuck, thread rolling wheel assembly and conversion assembly; The chuck is capable of clamping a workpiece and is connected to a driving source; The thread rolling wheel assembly includes a base and two thread rolling wheels, and the two thread rolling wheels are connected to the base through a connecting arm; The conversion assembly includes an annular disk and a center wheel. The annular disk is rotatably arranged and has a plurality of mounting grooves connecting the inner and outer sides around the circumference. The base is slidably connected in the mounting groove. The center wheel is fixedly arranged on the inner side of the annular disk and is smaller than the inner circle of the annular disk. A push block is provided on the center wheel. An end of the base close to the center wheel is provided with an inclined surface. The push block can abut against the inclined surface and push the base to slide in the mounting groove.

2. A thread rolling device according to claim 1, characterized in that: A limiting block is provided on the inner wall of the outer end of the installation groove, and the base can abut against the limiting block.

3. A thread rolling device according to claim 2, characterized in that: The inner wall of the installation groove is provided with a sliding groove along the sliding direction of the base. The base is slidably connected to the sliding groove, and both ends can respectively abut against the two ends of the sliding groove.

4. A thread rolling device according to claim 3, characterized in that: The outer wall of the annular disk is provided with a plurality of slidingly connected slot covers around the circumference, and the slot covers can close the installation slots.

5. The thread rolling device according to claim 1, characterized in that: A gear ring is circumferentially provided on the outer side of the annular disk. The conversion assembly further comprises a conversion motor and a driving gear. The conversion motor is connected to the driving gear, and the driving gear is meshed with the gear ring.

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