Thread rolling plate
By setting a grinding guide and machining section on the thread rolling plate and performing heat treatment, the problems of low structural strength and high instantaneous stress of the thread rolling plate are solved, achieving high-precision product processing and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-10
AI Technical Summary
The existing thread rolling dies have low strength of the thread rolling surface structure, resulting in low processing accuracy and short service life. In addition, the instantaneous stress generated when two thread rolling dies are joined during processing is large, which can easily damage the product.
A first thread rolling surface and a second thread rolling surface are set on the thread rolling plate by grinding. The first thread rolling surface includes a guide part and a machining part, and the second thread rolling surface also includes a guide part and a machining part. The surface is shaped by grinding and heat-treated to improve structural strength. The guide parts are connected to each other to reduce instantaneous stress, and the guide parts and machining parts cooperate to improve machining accuracy.
It improves the structural strength and service life of the thread rolling die, reduces the instantaneous stress on the product, and ensures processing accuracy and effect.
Smart Images
Figure CN223981127U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining equipment technology, and in particular to thread rolling plates. Background Technology
[0002] External threads are typically machined using custom threading tools, extruded using thread rolling mills, or cold rolled using thread rolling wheels. However, machining with custom threading tools results in products with poor dimensional stability and surface roughness, and cold rolling with thread rolling wheels is unsuitable for micro-threads. Therefore, extrusion using thread rolling mills is the preferred method for machining micro-threads.
[0003] In existing technologies, the manufacturing process for the inner thread rolling surface of thread rolling dies is milling. Milling results in a thread rolling surface with low structural strength, leading not only to low machining accuracy of the finished product but also to a short lifespan for the thread rolling die. Furthermore, during the thread rolling process, the instantaneous stress generated when two thread rolling dies are joined together is significant, easily damaging the product.
[0004] Therefore, there is an urgent need to invent a thread rolling die to solve the above problems. Utility Model Content
[0005] The purpose of this invention is to provide a thread rolling plate to improve the structural strength of the first and second thread rolling surfaces and ensure the processing effect on the product.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Thread rolling dies include:
[0008] A first plate, the first plate having a first thread-rolling surface, the first thread-rolling surface being formed by grinding, the first thread-rolling surface including a first guide portion and a first processing portion sequentially connected along a predetermined direction; and
[0009] The second plate has a second thread rolling surface, which is formed by grinding. The second thread rolling surface includes a second guide portion and a second processing portion connected in sequence along a preset direction. The first thread rolling surface passes through the second thread rolling surface along the preset direction with the first guide portion approaching the second guide portion along the preset direction.
[0010] As an optional solution, the length of the first guide portion along the preset direction is 1 / 3 to 1 / 9 of the length of the first processing portion along the preset direction;
[0011] The length of the second guide portion along the preset direction is 1 / 3 to 1 / 9 of the length of the second processing portion along the preset direction.
[0012] As an optional solution, the first plate has a first mounting hole on its side wall along the preset direction, and the first mounting hole is configured to be fixed to the base.
[0013] As an optional solution, the first mounting holes are provided on both sides of the first plate along the preset direction.
[0014] As an optional solution, at least two first mounting holes are provided at intervals along the preset direction on both side walls of the first plate.
[0015] As an optional option, the diameter of the first mounting hole is 8 to 12 mm.
[0016] As an option, the thread profile at the first thread rolling surface is the same as the thread profile at the second thread rolling surface.
[0017] As an optional feature, the surface roughness of the thread at the first thread rolling surface is less than Ra0.2;
[0018] The surface roughness of the thread at the second thread rolling surface is less than Ra0.2.
[0019] As an alternative, the first plate has a first back surface disposed opposite to the first thread rolling surface, and the first guide portion extends along the preset direction away from the first processing portion while tilting towards the first back surface.
[0020] As an optional solution, the height difference between the end of the first guide portion connected to the first processing portion along the preset direction and the other end away from the first processing portion along the opposite direction of the first thread rolling surface and the first back surface is 0.3 to 0.4 mm.
[0021] The beneficial effects of this utility model are:
[0022] The thread rolling plate provided by this utility model has a first thread rolling surface on a first plate body and a second thread rolling surface on a second plate body. The first thread rolling surface includes a first guide portion and a first processing portion connected in sequence along a preset direction, and the second thread rolling surface includes a second guide portion and a second processing portion connected in sequence along a preset direction. When the first plate body and the second plate body work together to process a product, the first thread rolling surface in the first plate body can pass through the second guide portion and the second processing portion in sequence along the preset direction with the first guide portion close to the second guide portion in the second thread rolling surface in the second plate body. The docking of the first guide portion and the second guide portion can reduce the instantaneous stress applied to the product when the first plate body and the second plate body dock, thereby improving the protection of the product. Moreover, by processing both the first thread rolling surface and the second thread rolling surface by grinding, the structural strength of the first thread rolling surface and the second thread rolling surface can be improved, thereby improving the processing accuracy of the product and ensuring the processing effect of the product. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the first structure of the thread rolling plate provided in this embodiment of the utility model;
[0024] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;
[0025] Figure 3 This is a schematic diagram of the second structure of the thread rolling plate provided in this embodiment of the utility model;
[0026] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;
[0027] Figure 5 yes Figure 3 A magnified view of a section at point C;
[0028] Figure 6 This is a schematic diagram of the structure of the first plate provided in this embodiment of the utility model;
[0029] Figure 7 This is a schematic diagram of the structure of the second plate provided in this embodiment of the utility model;
[0030] Figure 8 This is an enlarged view of the thread inside the first thread rolling surface provided in this embodiment of the utility model.
[0031] In the picture:
[0032] 100. First plate; 110. First thread rolling surface; 111. First guide part; 112. First machining part; 120. First mounting hole;
[0033] 200, Second plate; 210, Second thread rolling surface; 211, Second guide part; 212, Second machining part; 220, Second mounting hole. Detailed Implementation
[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0038] For machining micro-threads, thread rolling extrusion is the preferred method. Currently, the manufacturing process for the inner thread rolling surface of thread rolling dies is milling. Milled thread rolling surfaces have lower structural strength, resulting in lower machining accuracy and shorter die lifespan. Furthermore, the instantaneous stress generated when two thread rolling dies are joined during the thread rolling process is significant, easily damaging the product.
[0039] To solve the above problems, such as Figures 1 to 7 As shown, this embodiment provides a thread rolling plate. The thread rolling plate includes a first plate 100 and a second plate 200 disposed opposite to each other. The first plate 100 has a first thread rolling surface 110, which is formed by grinding. The first thread rolling surface 110 includes a first guide portion 111 and a first processing portion 112 connected in sequence along a preset direction. The second plate 200 has a second thread rolling surface 210, which is also formed by grinding. The second thread rolling surface 210 includes a second guide portion 211 and a second processing portion 212 connected in sequence along a preset direction. The first thread rolling surface 110 passes through the second thread rolling surface 210 in a preset direction with the first guide portion 111 approaching the second guide portion 211.
[0040] The thread rolling die has a first thread rolling surface 110 on a first plate 100 and a second thread rolling surface 210 on a second plate 200. The first thread rolling surface 110 includes a first guide portion 111 and a first processing portion 112 connected in sequence along a preset direction, and the second thread rolling surface 210 includes a second guide portion 211 and a second processing portion 212 connected in sequence along a preset direction. When the first plate 100 and the second plate 200 work together to process a product, the first thread rolling surface 110 in the first plate 100 can approach the second thread rolling surface 212 in the second plate 200 through the first guide portion 111. The second guide section 211 in section 10 passes sequentially through the second guide section 211 and the second processing section 212 along a preset direction. The docking of the first guide section 111 and the second guide section 211 reduces the instantaneous stress applied to the product when the first plate 100 and the second plate 200 dock, improving product protection. Furthermore, by processing both the first thread-rolling surface 110 and the second thread-rolling surface 210 using grinding, the structural strength of both surfaces is improved, thereby enhancing the processing accuracy and ensuring the desired processing effect. It should be noted that in this embodiment, the preset direction is left-right. In other embodiments, the specific direction of the preset direction can be adjusted according to actual needs; this embodiment does not impose specific limitations.
[0041] In this embodiment, both the first plate 100 and the second plate 200 are formed using a preset material as the substrate. The first thread-rolling surface 110 and the second thread-rolling surface 210 are processed by grinding the substrate. By using a preset material as the substrate and processing the first thread-rolling surface 110 and the second thread-rolling surface 210 on the substrate through grinding, the structural strength of the first plate 100 and the second plate 200 can be improved from the perspective of the material strength of the first plate 100 and the second plate 200 themselves. This achieves the purpose of improving the processing accuracy and effect of the first thread-rolling surface 110 and the second thread-rolling surface 210 on the product, as well as improving the service life of the thread-rolling dies. It should be noted that the preset material is a special material for thread-rolling dies, such as 9SiCr, Cr12, or Cr12MoV. In this embodiment, both the first plate 100 and the second plate 200 are manufactured using 9SiCr as the substrate. In other embodiments, the first plate 100 and the second plate 200 may also be manufactured using Cr12 or Cr12MoV as the substrate, and this embodiment does not impose any specific limitations.
[0042] To further improve the structural strength of the first plate 100 and the second plate 200, both the substrate with the first thread-rolling surface 110 and the substrate with the second thread-rolling surface 210 produced by grinding are subjected to heat treatment. By sequentially heat-treating the substrate with the first thread-rolling surface 110 and the substrate with the second thread-rolling surface 210 produced by grinding, the mechanical properties of the substrate can be improved, residual stress inside the substrate can be eliminated, and the machinability of the substrate can be improved, thereby further enhancing the structural strength of the first plate 100 and the second plate 200.
[0043] Specifically, in this embodiment, the heat treatment involves at least four tempering processes and one cryogenic treatment. By subjecting the substrate with the first thread-rolling surface 110 and the substrate with the second thread-rolling surface 210, respectively, to at least four tempering processes and one cryogenic treatment, the hardness of the internal threads of the first thread-rolling surface 110 and the second thread-rolling surface 210 is increased, ensuring that the threads within the first thread-rolling surface 110 and the second thread-rolling surface 210 can be extruded onto the product to form the corresponding threads. The specific process steps and principles of the tempering and cryogenic treatments are existing technologies and will not be elaborated here.
[0044] It should be noted that, as Figure 8As shown, in this embodiment, the thread in the first thread rolling surface 110 is a trapezoidal thread. Correspondingly, the thread in the second thread rolling surface 210, which mates with the first thread rolling surface 110, is also a trapezoidal thread. In other embodiments, the threads in the first thread rolling surface 110 and the second thread rolling surface 210 can also be triangular threads or rectangular threads, as long as the tooth profile of the thread at the first thread rolling surface 110 is the same as the tooth profile of the thread at the second thread rolling surface 210. This embodiment does not impose specific limitations.
[0045] In addition, the surface roughness of the thread at the first thread rolling surface 110 is less than Ra0.2, and the surface roughness of the thread at the second thread rolling surface 210 is less than Ra0.2, so as to further ensure the machining accuracy of the product by the first thread rolling surface 110 and the second thread rolling surface 210.
[0046] To ensure the processing effect of the first thread-rolling surface 110 in the first plate 100 and the second thread-rolling surface 210 in the second plate 200 on the product, the length of the first guide portion 111 along the preset direction is 1 / 3 to 1 / 9 of the length of the first processing portion 112 along the preset direction, and the length of the second guide portion 211 along the preset direction is 1 / 3 to 1 / 9 of the length of the second processing portion 212 along the preset direction. This allows the product to be extruded between the first processing portion 112 and the second processing portion 212 after being guided and buffered by the first guide portion 111 and the second guide portion 211, which are of sufficient length. It should be noted that in this embodiment, the length of the first guide portion 111 along the preset direction is 15mm, the length of the first processing portion 112 along the preset direction is 90mm, the length of the second guide portion 211 along the preset direction is 15mm, and the length of the second processing portion 212 along the preset direction is 75mm. The length of the first guide portion 111 along the preset direction is 1 / 6 of the length of the first processing portion 112 along the preset direction, and the length of the second guide portion 211 along the preset direction is 1 / 5 of the length of the second processing portion 212 along the preset direction.
[0047] In other embodiments, the ratio of the length of the first guide portion 111 along the preset direction to the length of the first processing portion 112 along the preset direction, and the ratio of the length of the second guide portion 211 along the preset direction to the length of the second processing portion 212 along the preset direction can also be adjusted within the range of 1 / 3 to 1 / 9 according to actual needs. This embodiment does not impose specific limitations.
[0048] Furthermore, in this embodiment, the preset direction is the length direction of the first plate 100 and the second plate 200, the width of the first plate 100 and the second plate 200 is 25mm, and the height of the first plate 100 and the second plate 200 is 25mm.
[0049] In this embodiment, as Figures 1-4As shown, the first plate 100 has a first back surface disposed opposite to the first thread-rolling surface 110. The first guide portion 111, connected to one end of the first processing portion 112 in a preset direction, extends away from the first processing portion 112 while simultaneously tilting towards the first back surface. By extending the first guide portion 111 away from the first processing portion 112 in a preset direction while tilting towards the first back surface opposite to the first thread-rolling surface 110, the inclined surface of the first guide portion 111 provides guidance for the product, while the gap created by the tilt of the first guide portion 111 provides buffer space for the product.
[0050] Specifically, the height difference between the end of the first guide portion 111 connected to the first processing portion 112 along a preset direction and the other end away from the first processing portion 112, along the direction opposite to the first thread-rolling surface 110 and the first back surface, is 0.3 to 0.4 mm. By limiting the height difference between the end of the first guide portion 111 connected to the first processing portion 112 along a preset direction and the other end away from the first processing portion 112, along the direction opposite to the first thread-rolling surface 110 and the first back surface, to a range of 0.3 to 0.4 mm, it can be ensured that the first guide portion 111 and the second guide portion 211 gradually increase the extrusion force applied to the product while providing guidance and compression buffer, so as to facilitate the subsequent extrusion processing of the product by the first processing portion 112 and the second processing portion 212. It should be noted that, in this embodiment, the height difference between the end of the first guide portion 111 connected to the first processing portion 112 along a preset direction and the other end away from the first processing portion 112, along the direction opposite to the first thread-rolling surface 110 and the first back surface, is 0.35 mm. In other embodiments, the height difference between the two ends of the first guide portion 111 along the preset direction can be adjusted within the range of 0.3 to 0.4 mm according to actual needs. This embodiment does not impose specific limitations.
[0051] Furthermore, in this embodiment, the specific structure of the second guide portion 211 is the same as that of the first guide portion 111. To keep the text concise, the specific structure of the second guide portion 211 will not be described in detail here.
[0052] In this embodiment, the first plate 100 is a movable plate, and the second plate 200 is a stationary plate. The first plate 100 and the second plate 200 are respectively mounted on a base, and the base drives the first plate 100 to move relative to the second plate 200. Figure 1 and Figure 3As shown, a first mounting hole 120 is formed on the side wall of the first plate 100 along a preset direction. The first mounting hole 120 is configured to be fixed to the base. By forming the first mounting hole 120 on the side wall of the first plate 100 along the preset direction, and fixing it to the base using the first mounting hole 120, the assembly and fixation of the first plate 100 and the base can be achieved. It should be noted that, in this embodiment, a boss is provided in the base that engages with the first mounting hole 120. When the first plate 100 is installed in the base, the boss on the base is precisely inserted into the first mounting hole 120.
[0053] It should be noted that the diameter of the first mounting hole 120 is 8-12 mm. In this embodiment, the diameter of the first mounting hole 120 is preferably 10 mm. In other embodiments, the diameter of the first mounting hole 120 can also be adjusted within the range of 8-12 mm according to actual needs, and this embodiment does not impose a specific limitation.
[0054] Optionally, the first plate 100 has first mounting holes 120 on both sides of its two side walls along a preset direction. By providing first mounting holes 120 on both side walls of the first plate 100 along the preset direction, the fixing stability between the first plate 100 and the base can be further improved.
[0055] Furthermore, at least two first mounting holes 120 are provided at intervals along the preset direction on each of the two side walls of the first plate 100. It should be noted that in this embodiment, two first mounting holes 120 are provided at intervals along the preset direction on each of the two side walls of the first plate 100, and each first mounting hole 120 corresponds to a boss within the base. In other embodiments, the number of first mounting holes 120 on the two side walls of the first plate 100 along the preset direction can be adjusted according to actual needs.
[0056] The second plate 200 provided in this embodiment has second mounting holes 220 on both side walls along a preset direction. The arrangement of the second mounting holes 220 is the same as that of the first mounting holes 120 in the first plate 100, and will not be described again here.
[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A thread rolling die set, characterized in that, The first plate body (100) has a first thread rolling surface (110) formed by grinding, and the first thread rolling surface (110) comprises a first guide part (111) and a first processing part (112) connected in sequence along a preset direction. The second plate body (200) has a second thread rolling surface (210) formed by grinding, and the second thread rolling surface (210) comprises a second guide part (211) and a second processing part (212) connected in sequence along a preset direction. The length of the first guide part (111) along the preset direction is 1 / 3-1 / 9 of the length of the first processing part (112) along the preset direction. The length of the second guide part (211) along the preset direction is 1 / 3-1 / 9 of the length of the second processing part (212) along the preset direction.
2. The thread die according to claim 1, wherein The first plate body (100) is provided with a first mounting hole (120) on the side wall along the preset direction, and the first mounting hole (120) is configured to be mounted and fixed with a base. The first plate body (100) is provided with the first mounting hole (120) on both side walls along the preset direction.
3. The thread die set of claim 1, wherein, The first plate body (100) is provided with at least two first mounting holes (120) on both side walls along the preset direction.
4. The thread die according to claim 3, wherein The first mounting hole (120) has a hole diameter of 8-12 mm.
5. The thread die according to claim 4, wherein The thread at the first thread rolling surface (110) has the same thread form as the thread at the second thread rolling surface (210).
6. The thread die set of claim 3, wherein, The surface roughness of the thread at the first thread rolling surface (110) is less than Ra0.
2.
7. The thread die set of claim 1, wherein, The surface roughness of the thread at the second thread rolling surface (210) is less than Ra0.
2.
8. The thread die set of claim 1, wherein, The first plate body (100) has a first back surface opposite to the first thread rolling surface (110), and the end of the first guide part (111) connecting the first processing part (112) extends away from the first processing part (112) along the preset direction while tilting towards the first back surface along the preset direction. The height difference between the end of the first guide part (111) connecting the first processing part (112) and the other end away from the first processing part (112) along the opposite direction of the first thread rolling surface (110) and the first back surface is 0.3-0.4 mm.
9. The thread die set of claim 1, wherein, 10. The thread rolling die set of claim 9 wherein,