Molding cutter meeting specific roughness requirement
By designing a forming tool with a tooth pitch of 0.2 mm, the problem of uneven hole wall roughness in the production of motor transmission housing was solved, achieving a uniform and delicate hole wall structure and efficient processing, thus reducing production costs.
Patent Information
- Application Number
- CN202520251756.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-18
AI Technical Summary
During the production of motor transmission housing, it is difficult to simultaneously meet the surface roughness requirements of Rz8~16 for three precision-machined holes, and the hole wall texture must be uniform and delicate to avoid leakage risks.
Design a forming tool comprising a forming insert with multiple teeth and a forming tool body, wherein the tooth pitch is an integer multiple of 0.2 mm, combined with a water outlet center hole and a connecting groove, for uniformly and delicately forming a thread-like structure, and controlling the roughness to Rz11.2~14.4 through two feeds.
This achieves uniform and fine hole wall roughness, avoids burrs, meets specific roughness requirements, improves processing efficiency, and reduces costs.
Smart Images
Figure CN223848118U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor variable speed shell production technical field especially is a kind of forming tool satisfying specific roughness requirement. BACKGROUND
[0002] In the production process of motor variable speed shell, it needs to be finished three holes. And the roughness requirement of the three holes is Rz8~16, and to prevent the product from leaking, the roughness line needs to be uniform and delicate, and the product surface is not fine scratch. In actual production process, because the hole tolerance is small, it is difficult to meet the roughness Rz8~16 and the uniform and delicate line. SUMMARY
[0003] Therefore, the utility model wants to solve the technical problem in the prior art.
[0004] To solve the above technical problems, the utility model provides a kind of forming tool satisfying specific roughness requirement, including:
[0005] Forming tool body, front end is equipped with multiple row cutting grooves;Multiple row cutting grooves are arranged along the axis center symmetry of forming tool body;
[0006] Multiple forming blades, forming blade is set one by one with row cutting groove;Forming blade is connected in the side surface of forming tool body close to row cutting groove;The outside of forming blade is equipped with the multiple teeth in turn arranged on axis, and the pitch of tooth is N×0.2 mm, and N is integer;
[0007] Tool bar, coaxially connected in the end of forming tool body.
[0008] In an embodiment of the utility model, the pitch of tooth is 0.4mm.
[0009] In an embodiment of the utility model, the fillet of tooth tip of tooth is R0.05~ R0.08.
[0010] In an embodiment of the utility model, the application also includes the water outlet center hole along the axis extension of forming tool body, and the water outlet center hole is through tool bar and extends to forming tool body;Forming tool body is equipped with communication hole, and communication hole is used to communicate row cutting groove and water outlet center hole.
[0011] In an embodiment of the utility model, the water outlet center hole is two;The end of tool bar is also equipped with a slot, and two water outlet center holes are communicated with a slot.
[0012] In an embodiment of the utility model, the material of forming blade is different from the material of forming tool body.
[0013] In an embodiment of the utility model, the material of the forming blade is PCD.
[0014] In an embodiment of the utility model, the material of the forming knife body is hard alloy.
[0015] In an embodiment of the utility model, the forming blade and the forming knife body are fixed by welding.
[0016] In an embodiment of the utility model, the center position of the front end face of the forming knife body is provided with a top hole.
[0017] The above technical scheme of the utility model has the following advantages compared with the prior art:
[0018] The forming tool satisfying the specific roughness requirement has the forming blade with multiple teeth arranged on the forming knife body, so that uniform and delicate thread-like structures are formed on the hole wall when machining the hole, and the pitch of the thread-like structures is an integer multiple of 0.2 mm. The roughness of the product after hole machining by the application is Rz11.2~14.4, and the hole wall roughness is uniform and free of burrs. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to make the content of the utility model more easily understood clearly, the utility model is further described in detail below according to the specific embodiments of the utility model and in combination with the drawings, in which:
[0020] Figure 1 is a structure schematic view of a forming tool satisfying the specific roughness requirement in the preferred embodiment of the utility model;
[0021] Figure 2 is Figure 1 the front view of the forming tool satisfying the specific roughness requirement;
[0022] Figure 3 is Figure 2 the B-B sectional view;
[0023] Figure 4 is Figure 1 the side view of the forming tool satisfying the specific roughness requirement;
[0024] DESCRIPTION OF DRAWINGS MARKS: 100, forming knife body; 110, row of cutting grooves; 120, communication hole; 130, top hole;
[0025] 200, forming blade; 210, tooth;
[0026] 300, knife rod; 310, one-dot chain groove;
[0027] 400, water outlet center hole. DETAILED DESCRIPTION
[0028] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.
[0029] In some comparative examples, the processing mode of the hole is milling cutter, boring, reaming, internal circle rough grinding and turning, wherein the processing mode suitable for machining center is only milling cutter, boring and reaming.
[0030] Milling cutter: the milling cutter after side edge wear, roughness Rz8~16 requirement can be achieved by cutter milling method occasionally, but roughness stability is not sustainable, and the processing requirements of roughness and hole diameter cannot be met at the same time.
[0031] Boring: through the cutter tooth and rotational speed feed, general hole diameter and surface roughness requirement can be met. However, the size processing requirements of the hole in the application (hole diameter ± 0.015, hole diameter depth 150mm, hole and product surface perpendicularity 0.015mm, hole and hole position degree requirement 0.02mm) will need to split multiple tool processing, which seriously affects the processing time.
[0032] Reaming: the cutter tip is made into a sharp shape, and the hole roughness change is adjusted by different parameters processing, but the size processing requirements of the hole in the application (hole diameter ± 0.015, hole diameter depth 150mm, hole and product surface perpendicularity 0.015mm, hole and hole position degree requirement 0.02mm) cannot be met.
[0033] Reference Figures 1-4 The utility model embodiment provides a kind of forming tool meeting specific roughness requirement, comprising:
[0034] Forming tool body 100, front end is equipped with multiple row cutting grooves 110;Multiple row cutting grooves 110 are arranged along the axis center symmetry of forming tool body 100;
[0035] Multiple forming blades 200, forming blade 200 is set one by one with row cutting groove 110;Forming blade 200 is connected in the side of forming tool body 100 close to row cutting groove 110;The outside of forming blade 200 is equipped with the multiple teeth 210 in sequence in axis, and the pitch of tooth 210 is N × 0.2 mm, and N is integer;
[0036] Tool bar 300, coaxially connected in the end of forming tool body 100.
[0037] The inventor analyzes existing tool (adopting existing fine finishing cutter with damage blade, thread milling cutter):
[0038] The fine finishing cutter belt damage blade: the different parameters processing and the tooth height low for the hole roughness change is big, through the debugging, because the fine finishing cutter is the review cutter, the product hole diameter and the perpendicularity requirement is strict, the processing parameter cannot satisfy the three cutter hole wall roughness and the product size processing requirement simultaneously.
[0039] Thread milling cutter (pitch 1.25mm, diameter 6mm): through winding milling, four layers (pitch 0.312mm), the hole wall roughness is adjusted by controlling the tooth cutting into the hole wall depth through radius compensation, although the measured roughness can be controlled in Rz18, but the hole wall surface roughness is too rough, there is a risk of leakage.
[0040] Therefore, in order to solve the above problems, a new cutter needs to be provided. Inspired by the above thread milling cutter, a forming cutter with teeth 210 can be designed, which can be designed to be denser in pitch to meet the requirements of roughness and uniform and delicate texture. It has been verified that the pitch of the texture is 0.2mm, which can meet the requirements.
[0041] Use the present application to process holes (take the pitch of the teeth 210 in the forming cutter as an example, which is 0.4mm): through winding milling, the processing program is divided into two layers, which are staggered in and out of the cutter, so as to avoid repeated cutting at the same point, which leads to roughness. The hole wall roughness is adjusted by controlling the tooth 210 cutting into the hole wall depth through radius compensation (the cutter compensation amount is 0.01mm), the measured roughness can be effectively controlled in Rz11.2~14.4, the roughness texture is uniform and delicate, which meets the customer's requirements. As described above, through the present application, the cutting depth into the workpiece surface is 0.01mm, which can effectively control the surface roughness of the hole wall after processing to be in Rz11.2~14.4, and the hole wall roughness texture is uniform and without burr.
[0042] Specifically, the present application provides a forming blade 200 with a plurality of teeth 210 on the forming cutter body 100, so that when processing holes, uniform and delicate thread-like structures will be formed on the hole wall, and the pitch of the thread-like structure is an integer multiple of 0.2mm. The roughness of the product after hole processing by the present application is Rz11.2~14.4, and the hole wall roughness texture is uniform and without burr.
[0043] Further, the pitch of the teeth 210 is 0.4 mm. If the pitch is larger, the difficulty of processing the forming tool is reduced, but multiple feedings are required, which affects the processing efficiency of the hole. If the pitch is smaller, the difficulty of processing the forming tool is greatly increased. In order to solve this problem, the pitch of the present embodiment is 0.4 mm, which is twice the corresponding pitch (0.2 mm) under a specific roughness. The processing difficulty of the 0.4 mm pitch teeth 210 is relatively small, and it is easy to produce; in addition, it only needs two feedings when processing the hole. As can be seen, the present embodiment takes into account the processing difficulty of the forming tool and the processing efficiency of processing the hole by using the present application. In some embodiments, the taper of the teeth 210 is 15°. In some embodiments, the extension length L of the plurality of teeth 210 is 10 mm.
[0044] Further, the fillet of the tooth tip of the teeth 210 is R0.05~ R0.08. Specifically, the fillet is more conducive to meeting a specific roughness (Rz8~16).
[0045] Further, the present application also includes a water outlet center hole 400 extending along the axis of the forming tool body 100, the water outlet center hole 400 penetrates the tool shank 300 and extends into the forming tool body 100; the forming tool body 100 is provided with a communication hole 120, the communication hole 120 is used to communicate the chip removal groove 110 and the water outlet center hole 400. Specifically, the present embodiment provides a water outlet center hole 400, so that one end of the water outlet center hole 400 is connected with the docking equipment (providing cutting fluid), and the other end is communicated to the chip removal groove 110, so that cutting fluid is provided during the processing of the product of the present application, to play the role of cooling, lubrication, cleaning, rust prevention, etc.
[0046] Further, the water outlet center hole 400 is two; the tool shank 300 is also provided with a slot 310, and the two water outlet center holes 400 are communicated with the slot 310. Specifically, the present embodiment provides two water outlet center holes 400, and also provides a slot 310, so that the connection of the two water outlet center holes 400 with the docking equipment can be realized through the slot 310.
[0047] Further, the material of the forming blade 200 is different from that of the forming tool body 100. Specifically, the material of the forming blade 200 of the present embodiment is different from that of the forming tool body 100, the forming blade 200 is used to process the product, and the forming tool body 100 is used to support and fix the forming blade 200. Therefore, the forming blade 200 can be made of a material with good cutting performance, and the forming tool body 100 can be made of a relatively low-cost material, so as to meet the requirements of product processing and reduce the cost of the present application.
[0048] Further, the material of the profiled blade 200 is PCD. Specifically, the PCD material has the advantages of high hardness, high wear resistance, good thermal stability, high thermal conductivity, high impact resistance, and good chemical stability. The profiled blade 200 of the present embodiment is made of PCD material, which improves the service life of the profiled blade 200 and improves the machining precision.
[0049] Further, the material of the profiled blade body 100 is cemented carbide. Specifically, the profiled blade body 100 of the present embodiment is made of cemented carbide with low manufacturing cost, thereby reducing the cost of the present profile tool while ensuring the basic requirements.
[0050] Further, the profiled blade 200 and the profiled blade body 100 are fixed by welding. Specifically, copper brazing can be used.
[0051] Further, the profiled blade body 100 is provided with a top hole 130 at the center of the front end face. Specifically, the design of the top hole 130 facilitates the docking of the present application with other equipment for machining.
[0052] Obviously, the above embodiments are only examples for the purpose of clarity, and are not limiting of the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.
Claims
1. A profile tool meeting specific roughness requirements, characterized in that: Comprise: The forming cutter body is provided with a plurality of row cutting grooves at the front end; A plurality of row cutting grooves are arranged symmetrically along the axis of the forming cutter body; A plurality of forming blades are arranged one by one corresponding to the row cutting grooves; the forming blades are connected at the side of the forming cutter body close to the row cutting grooves; the outer side of the forming blades is provided with a plurality of teeth arranged in sequence on the axis, and the pitch of the teeth is N×0.2 mm, N is an integer; The cutter rod is coaxially connected to the end of the forming cutter body.
2. A profile cutter satisfying a certain roughness requirement according to claim 1, characterized in that: The pitch of the teeth is 0.4 mm.
3. The profile cutter satisfying a certain roughness requirement according to claim 1, characterized in that: The fillet of the tooth tip is R0.05~ R0.
08.
4. The profile cutter satisfying a certain roughness requirement according to claim 1, characterized in that: It also includes a water outlet center hole extending along the axis of the forming cutter body, the water outlet center hole penetrates the cutter rod and extends into the forming cutter body; the forming cutter body is provided with a communication hole for communicating the row cutting groove and the water outlet center hole.
5. A profile tool meeting specific roughness requirements according to claim 4, characterized in that: The water outlet center hole is two; the end of the cutter rod is also provided with a slot, and the two water outlet center holes are communicated with the slot.
6. The profile cutter satisfying a certain roughness requirement according to claim 1, characterized in that: The material of the forming blade is different from that of the forming cutter body.
7. A profile tool meeting specific roughness requirements according to claim 6, characterized in that: The material of the forming blade is PCD.
8. A profile cutter satisfying a certain roughness requirement according to claim 6, characterized in that: The material of the forming cutter body is hard alloy.
9. The profile cutter satisfying a certain roughness requirement according to claim 1, characterized in that: The forming blade and the forming cutter body are fixed by welding.
10. The profile cutter satisfying a certain roughness requirement according to claim 1, characterized in that: The center position of the front end face of the forming cutter body is provided with a top hole.