Secondary machining tool for multi-source threaded core
By using the rigid constraints of the secondary machining fixture for multi-source threaded cores and synchronous machining of the reference, the problems of separation between the reference and the thread, incompatibility between multiple sources, and failure of repeated machining in thread machining are solved, ensuring the phase consistency of the starting point of electrodes in different batches and realizing efficient thread machining.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-03-24
AI Technical Summary
Existing thread machining processes suffer from problems such as separation of the reference point and the thread, incompatibility between multiple sources, and repeated machining failures, resulting in inconsistent starting point phases of electrodes from different batches.
A multi-source threaded core secondary machining fixture is adopted. Through rigid constraints and synchronous machining with reference, the grooves on the mating surfaces of the first and second pressure plates are fully engaged with the prefabricated threaded electrode. Combined with positioning and locking components, the phase consistency of the starting thread point of electrodes from different batches is ensured.
It achieves phase consistency of the starting tooth point of electrodes from different batches, and solves the problem of inconsistent starting tooth point phase of thread cores of the same model under different suppliers and processing conditions. The structure is simple and highly practical.
Smart Images
Figure CN224027025U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to mould processing frock technical field, concretely relates to a kind of secondary processing frock of multi-source thread core. BACKGROUND
[0002] Existing thread processing and use technology are relatively mature, but there are the following problems in practical application: 1. reference and thread separation: purchased electrode reference surface and thread starting point (the starting point of thread) have no fixed phase relationship, i.e. relative position is not fixed (actual measurement deviation ±1.5P (pitch)), which may be different each time measurement or manufacturing.2. Multiple sources are incompatible: the same type thread core starting tooth phase deviation of different suppliers / processing parameters is > ±1.2P.3. Repeated processing failure: electrode wear cannot be reused by secondary cutting (loss rate >80%).Therefore, the utility model comes from this. SUMMARY
[0003] For at least one of the above technical problems, the utility model aims to provide a kind of secondary processing frock of multi-source thread core, by rigid constraint and reference synchronous processing, ensure that the phase consistency of the starting tooth point of different batches of electrodes.
[0004] The technical scheme of the utility model is:
[0005] The utility model aims to provide a kind of secondary processing frock of multi-source thread core, comprising:
[0006] The thickness direction of first pressing plate one face is implemented as first bonding surface, and first tooth groove is opened on the first bonding surface for engaging with the full circumference of the thread of prefabricated thread electrode when prefabricated thread electrode is loaded;
[0007] Second pressing plate is oppositely arranged with the first pressing plate and is pressed on the first pressing plate, and the face towards the first bonding surface is implemented as second bonding surface, and second tooth groove is opened on the second bonding surface corresponding to the first tooth groove and cooperating with the full circumference of the thread of prefabricated thread electrode;
[0008] Positioning assembly is connected between the first pressing plate and the second pressing plate;
[0009] Locking assembly is connected between the first pressing plate and the second pressing plate;
[0010] The first bonding surface and the second bonding surface leave a gap that is tightened during installation, and the locking assembly is adapted to lock the first pressing plate and the second pressing plate after the prefabricated thread electrode is loaded into the first tooth groove and the second tooth groove, and to apply a predetermined pre-tightening force to the prefabricated thread electrode between the two to constrain the circumferential degree of freedom of the prefabricated thread electrode.
[0011] Preferably, four first positioning holes are formed on the first pressing plate and penetrating the first bonding surface along the thickness direction of the first pressing plate, and four second positioning holes are formed on the second pressing plate and penetrating the second bonding surface along the thickness direction of the second pressing plate.
[0012] The positioning assembly comprises a positioning member corresponding to the four first positioning holes and the four second positioning holes.
[0013] Preferably, the positioning member is a positioning pin.
[0014] Preferably, two first locking holes are formed on the first pressing plate and penetrating the first bonding surface, and two second locking holes are formed on the second pressing plate and penetrating the second bonding surface and corresponding to the two first locking holes.
[0015] The locking assembly comprises two locking members corresponding to the two first locking holes and the two second locking holes.
[0016] Preferably, the locking member is a locking bolt.
[0017] Preferably, the tooth form angle tolerance of the first tooth groove and the second tooth groove is ±0.1°.
[0018] Preferably, the surface hardness of the first tooth groove and the second tooth groove is greater than or equal to 1200HV, and the friction coefficient μ is 0.18-0.22.
[0019] Preferably, the length of the first pressing plate is greater than that of the second pressing plate, and the first pressing plate is fixed to the machining platform by a fastener at a position avoiding the second pressing plate.
[0020] Preferably, an adjusting groove is formed on the first pressing plate at a position avoiding the second pressing plate, and the fastener is arranged in the adjusting groove.
[0021] Compared with the prior art, the utility model has the advantages of:
[0022] The utility model discloses a multi-source thread core secondary processing tool, through rigid constraint and benchmark synchronous processing, ensure that the starting tooth point phase consistency of different batches electrode, solved the same model thread core starting tooth point phase inconsistency problem of different suppliers, different processing conditions under production, simple structure, strong practicality. BRIEF DESCRIPTION OF DRAWINGS
[0023] The utility model discloses further describe below combining with the drawings and examples:
[0024] Figure 1 It is the structure diagram of multiple source thread core secondary processing frock of the utility model embodiment;
[0025] Figure 2 It is Figure 1 The top view of multiple source thread core secondary processing frock;
[0026] Figure 3 It is Figure 2 The A-A direction section view of multiple source thread core secondary processing frock;
[0027] Figure 4 It is the structure diagram of the first combination surface of the first pressing plate of multiple source thread core secondary processing frock of the utility model embodiment upwards;
[0028] Figure 5 It is the structure diagram of the second combination surface of the second pressing plate of multiple source thread core secondary processing frock of the utility model embodiment upwards;
[0029] Figure 6 It is the structure diagram of multiple source thread core secondary processing frock and prefabricated screw thread electrode assembly of the utility model embodiment;
[0030] Figure 7 It is the top perspective view of multiple source thread core secondary processing frock and prefabricated screw thread electrode assembly of the utility model embodiment.
[0031] Wherein: 10, the first pressing plate;11, the first alveolus;12, the first positioning hole;13, the first locking hole;14, the adjusting groove;20, the second pressing plate;21, the second alveolus;22, the second positioning hole;23, the second locking hole;30, the positioning piece;40, the locking piece;50, the fastener;60, prefabricated screw thread electrode;61, screw thread;62, reference surface. Specific implementation
[0032] To make the purpose, technical scheme and advantage of the utility model more clear and obvious, below combining specific implementation and referring to the drawings, the utility model is further detailedly explained.It should be understood that these descriptions are only exemplary, and are not to limit the scope of the utility model.In addition, in the following explanation, the description of known structure and technology is omitted to avoid unnecessary confusion of the concept of the utility model.
[0033] The utility model embodiment of a kind of multiple source thread core secondary processing frock, referring to Figures 1 to 7 , mainly include first pressing plate 10, second alveolus plate, positioning assembly and locking assembly.The first pressing plate 10 and second pressing plate 20 as Figure 1The first pressing plate 10 and the second pressing plate 20 are arranged in an upper-lower opposite and abutting manner, and the surface of the first pressing plate 10 opposite and abutting to the second pressing plate 20 is implemented as a first joint surface (not marked), and the surface of the second pressing plate 20 opposite and abutting to the first pressing plate 10 is implemented as a second joint surface (not marked). The first joint surface is provided with a first tooth groove 11 extending along the width direction of the first joint surface and having a semicircular cross section, and the second joint surface is provided with a second tooth groove 21 extending along the length direction of the second joint surface and having a semicircular cross section. The first tooth groove 11 and the second tooth groove 21 are oppositely arranged. A positioning assembly is connected between the first pressing plate 10 and the second pressing plate 20 to define the semicircular first tooth groove 11 and the semicircular second tooth groove 21 into a cylindrical tooth groove. In an initial state, that is, the locking assembly is not locked and is connected between the first pressing plate 10 and the second pressing plate 20, a gap (not marked) for locking during installation is reserved between the first joint surface and the second joint surface, and the gap is preferably 0.1 mm and 0.05 mm on each side, so as to avoid that the preformed thread electrode 60 is not pressed tightly when being clamped into the tooth groove formed by the first tooth groove 11 and the second tooth groove 21. The locking assembly is only connected between the first pressing plate 10 and the second pressing plate 20 in the initial state without locking force, and needs to be locked downward after the preformed thread electrode 60 is installed into the tooth groove to lock the preformed thread electrode 60 between the first pressing plate 10 and the second pressing plate 20, and a pre-tightening force of 60-100 N·m is applied during locking, and the purpose is to constrain the circumferential degree of freedom of the preformed thread electrode 60, so as to eliminate the original phase difference Δinitial. It needs to be noted that the first tooth groove 11 and the second tooth groove 21 are fully engaged with the thread 61 of the preformed thread electrode 60, and the tooth side gap needs to be less than or equal to 0.01 mm. In the embodiment, the "full engagement" means that the convex part (thread) and the groove part (tooth groove) of the thread are completely engaged on the whole circumference without gap or misalignment. In the embodiment, the thread 61 of the preformed thread electrode 60 and the tooth groove (including the first tooth groove 11 and the second tooth groove 21) are fully engaged, just like the perfect fit of the thread of the screw and the thread of the nut, and when being screwed in, it is very smooth without the feeling of looseness or jamming. The tool of the utility model synchronously processes the reference surface 62 of the preformed thread 61 and the cutting electrode length during processing, establishes the phase locking relationship of Δ=0.025P±0.005P (pitch), and can be repeatedly clamped for ≥5 times with a phase deviation accumulation of <0.003P (pitch). Through the rigid constraint and synchronous processing of the reference, the tool of the utility model ensures the consistency of the starting tooth point phase of different batches of electrodes, and solves the problem of inconsistent starting tooth point phase of the same type thread core produced under different processing conditions of different suppliers.
[0034] Specifically, as shown in Figure 1 , Figure 2 and Figure 4 , the first pressing plate 10 is a rectangular plate. It can be fixed on the working platform through the fastener 50. As shown in Figure 2 and Figure 4As shown in the drawings, the first pressing plate 10 is provided with a long strip-shaped or waist-shaped adjusting groove 14 at a position avoiding the second pressing plate 20, i.e., avoiding the second bonding surface, and a fastener 50 is arranged in the adjusting groove 14 and fixed to the workbench. The adjusting groove 14 is used to adjust the fixed position of the first pressing plate 10 relative to the workbench. Correspondingly, the second pressing plate 20 is provided with a long strip-shaped or waist-shaped adjusting groove 24 at a position avoiding the first pressing plate 10, i.e., avoiding the first bonding surface, and a fastener 50 is arranged in the adjusting groove 24 and fixed to the workbench. The adjusting groove 24 is used to adjust the fixed position of the second pressing plate 20 relative to the workbench. Figure 2 and Figure 5 As shown in the drawings, the second pressing plate 20 is a substantially square plate, and the size of the second pressing plate 20 is smaller than that of the first pressing plate 10, so that the first pressing plate 10 is provided with the adjusting groove 14 for connecting the fastener 50. For example, the size of the second pressing plate 20 is half of that of the first pressing plate 10. In order to realize the connection between the positioning assembly and the locking assembly, four first positioning holes 12 are arranged at both ends in the length direction of the first tooth groove 11 and both sides in the width direction of the first tooth groove 11, i.e., penetrating the thickness of the first pressing plate 10, i.e., penetrating the first bonding surface. Any first positioning hole 12 is preferably a cylindrical through hole with a smooth inner wall. Correspondingly, four second positioning holes 22 are arranged at both ends in the length direction of the second tooth groove 21 and both sides in the width direction of the second tooth groove 21, i.e., penetrating the thickness of the second pressing plate 20, i.e., penetrating the second bonding surface. The four second positioning holes 22 and the four first positioning holes 12 are one-to-one corresponding, and are all cylindrical through holes with smooth inner walls. The positioning assembly comprises four positioning members 30 corresponding to the four first positioning holes 12 and the four second positioning holes 22. For the first positioning hole 12, the second positioning hole 22 and the positioning pin, the same sequence machining technology is adopted in the embodiment of the utility model. Similarly, a first locking hole 13 penetrating the thickness of the first pressing plate 10, i.e., penetrating the first bonding surface, is arranged at both sides in the width direction of the first tooth groove 11 and between the four first positioning holes 12. Correspondingly, a second locking hole 23 penetrating the thickness of the second pressing plate 20, i.e., penetrating the second bonding surface, is arranged at both sides in the width direction of the second tooth groove 21 and between the four second positioning holes 22. The first locking hole 13 and the second locking hole 23 are both threaded through holes with internal threads on the inner walls. Correspondingly, the locking assembly comprises two locking members 40 corresponding to the two first locking holes 13 and the two second locking holes 23. In the embodiment, any locking member 40 is a T-shaped locking bolt with external threads. It should be noted that in the embodiment, the center distance tolerance of the corresponding holes (including the first positioning hole 12, the second positioning hole 22, the first locking hole 13 and the second locking hole 23) on the first pressing plate 10 and the second pressing plate 20 is ±0.005 mm, and the position degree of the corresponding first positioning hole 12 and the second positioning hole 22 is ≤0.003 mm (three-coordinate detection).
[0035] In the embodiment, the tooth angle tolerance of the first tooth groove 11 and the second tooth groove 12 is ±0.1°. The surfaces of the first tooth groove 11 and the second tooth groove 12 are treated by micro-arc oxidation, the hardness is ≥1200 HV, and the friction coefficient μ is 0.18-0.22.
[0036] In the embodiment of the utility model, the technical features are used when the tool is processed:
[0037] 1. Gap control technology:
[0038] Combined surface total gap calculation formula:
[0039] C total = 2 x (t plate -t design ) (t plate = one-sided pressing plate processing amount, t design = theoretical plate thickness).
[0040] 2. Phase locking mechanism:
[0041] Utilize the self-centering effect of the thread engagement surface to forcibly constrain the electrode circumferential position:
[0042] θmax = arctan (Δc / P) ≤ 0.1° (Δc = tooth side gap, P = thread pitch).
[0043] Two embodiments are provided in the embodiment to verify the use effect of the tool of the utility model:
[0044] Example 1: Secondary processing of externally purchased M8x1.25 electrode
[0045]
[0046] Example 2: Multi-supplier electrode verification
[0047]
[0048] Note: All batches meet the ±0.02mm (±0.016P) tolerance requirements.
[0049] It should be understood that the above specific embodiments of the utility model are only used for illustrative or explanatory purposes of the principles of the utility model, and do not constitute a limitation on the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without deviating from the spirit and scope of the utility model should be included within the protection scope of the utility model. In addition, the appended claims of the utility model are intended to cover all changes and modifications falling within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.
Claims
1. A secondary machining fixture for multi-source threaded cores, characterized in that, include: The first pressure plate has one side in the thickness direction as a first mating surface, and the first mating surface has a first groove for the pre-made threaded electrode to be fully engaged with the thread of the pre-made threaded electrode when it is installed. The second pressure plate is disposed opposite to the first pressure plate and pressed onto the first pressure plate, and its surface facing the first mating surface is the second mating surface. The second mating surface has a second groove that corresponds to and matches the first groove and engages with the thread of the prefabricated thread electrode around its entire circumference. A positioning component is connected between the first pressure plate and the second pressure plate; A locking assembly is connected between the first pressure plate and the second pressure plate; A gap is left between the first mating surface and the second mating surface for tightening during installation. The locking assembly is adapted to lock the first pressure plate and the second pressure plate after the pre-made threaded electrode is installed in the first and second threaded grooves and to apply a predetermined preload force to the pre-made threaded electrode between them to constrain the circumferential degree of freedom of the pre-made threaded electrode.
2. The secondary machining fixture for multi-source threaded cores according to claim 1, characterized in that, The first pressure plate has four first positioning holes that penetrate the first mating surface along the thickness direction of the first pressure plate at both ends of the length direction of the first tooth groove and on both sides of the width of the first tooth groove. The second pressure plate has four second positioning holes that penetrate the second mating surface along the thickness direction of the second pressure plate at both ends of the length direction of the second tooth groove and on both sides of the width of the second tooth groove. The positioning component includes positioning elements that correspond one-to-one with the four first positioning holes and the four second positioning holes.
3. The secondary machining fixture for multi-source threaded cores according to claim 2, characterized in that, The positioning component is a positioning pin.
4. The secondary machining fixture for multi-source threaded cores according to claim 2, characterized in that, The first pressure plate has two first locking holes that are symmetrical about the first tooth socket and penetrate the first mating surface. The second pressure plate has two second locking holes that are symmetrical about the second tooth socket and penetrate the second mating surface, and correspond one-to-one with the two first locking holes. The locking assembly includes two locking elements that are correspondingly inserted into the two first locking holes and the two second locking holes.
5. The secondary machining fixture for the multi-source threaded core according to claim 4, characterized in that, The locking component is a locking bolt.
6. The secondary machining fixture for multi-source threaded cores according to claim 1, characterized in that, The tooth angle tolerance of the first alveolar and the second alveolar is ±0.1°.
7. The secondary machining fixture for multi-source threaded cores according to claim 1 or 6, characterized in that, The surface hardness of the first alveolar bone and the second alveolar bone is ≥1200HV, and the coefficient of friction μ is 0.18~0.
22.
8. The secondary machining fixture for multi-source threaded cores according to claim 1, characterized in that, The length of the first pressure plate is greater than that of the second pressure plate, and the first pressure plate is fixed to the processing platform by a fastener at a position that avoids the position of the second pressure plate.
9. The secondary machining fixture for multi-source threaded cores according to claim 8, characterized in that, The first pressure plate has an elongated adjustment groove at a position away from the second pressure plate, and the fastener passes through the adjustment groove.