Forming cutter for trimming excircle size and roundness
By designing a trimming knife for injection molding parts with an outer circular size and a roundness, the problem of difficult to ensure the outer circular size and a roundness of injection molding parts is solved, and an efficient dressing process is realized, which improves the production pass rate and reduces the The cost.
Patent Information
- Application Number
- CN202420253896.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-02-02
AI Technical Summary
The prior art is difficult to ensure that the outer circle size and same roundness of injection molded plastic parts are qualified, resulting in air leakage at the joints. Existing solutions such as mold repair or adjustment of injection molding process parameters are time-consuming and labor-intensive and may not be successful.
A trimming tool with outer circle size and same roundness is designed, including rotary blocks, round grooves, guide shafts and cutting heads. Through the coordination of guide shafts and cutting heads, the outer circle of the product can be trimmed.
This molding knife can effectively ensure the same roundness of the inner circle and outer circle of the product, simplify the dressing process, improve the production pass rate, and reduce production costs.
Smart Images
Figure CN222472662U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a shaping knife for trimming outer circle size and roundness. Background Art
[0002] At present, more and more automobiles use plastic parts to achieve lightweight design. However, when injecting plastic parts with shaft tubes and joints, it is difficult to ensure a sufficient pass rate for the outer circle size and roundness. Figure 1 The automobile air pressure sensor shown in the figure has an air leakage problem when docking with a hose if the outer diameter and roundness of the joint are not up to standard. This problem is usually solved by repairing the mold or adjusting the injection molding process parameters, which is not only time-consuming and labor-intensive, but also may not be successfully repaired. Therefore, it is necessary to invent a new outer diameter and roundness trimming forming tool. Utility Model Content
[0003] The utility model aims to provide a shaping knife for trimming outer circle size and roundness, which can trim the outer circle size and roundness of injection molded parts and ensure the production qualification rate.
[0004] The technical solution adopted by the utility model to solve its technical problems is:
[0005] A tool for trimming and forming outer circle size and roundness comprises a rotating block, wherein a circular groove is arranged in the rotating block, wherein a guide shaft concentric with the circular groove is arranged in the circular groove, and a plurality of groups of cutting bits are fixedly arranged on the inner circular surface of the circular groove, wherein the cutting bits are evenly spaced along the circumference of the circular groove with the guide shaft as the center, and a gap is arranged between the cutting bits and the guide shaft.
[0006] Furthermore, a cutting bevel is provided on a side of the cutting head close to the guide shaft.
[0007] Furthermore, a feed chamfer is provided on one side of the cutting bevel close to the circular groove inlet.
[0008] Furthermore, the cutting bits are provided in at least two groups.
[0009] Furthermore, the cutting bits are provided in four groups.
[0010] Furthermore, the rotating block is a cylindrical structure, and the circular groove is cocentric with the rotating block.
[0011] Furthermore, a limit stopper is provided on a side of the rotating block away from the circular groove inlet.
[0012] Furthermore, a plurality of groups of operating handles are fixedly connected to the outer side wall of the rotating block.
[0013] The beneficial effects of the utility model are as follows: the guide shaft and the cutter head in the forming knife of the utility model cooperate with each other to ensure the same roundness of the inner circle and the outer circle of the product, and can well trim the outer circle of the product, which is convenient and fast, ensuring the production qualification rate of the product, without the need to repair the mold or adjust the injection molding process parameters, and the production cost is low.
[0014] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a product diagram of the air pressure sensor in the utility model.
[0016] Figure 2 It is a schematic diagram of the cooperation between the air pressure sensor and the forming knife in the utility model.
[0017] Figure 3 The utility model is a structural diagram of a shaping cutter for trimming outer circle size and roundness.
[0018] Figure 4 The utility model is a front view of a trimming and forming knife for outer circle size and roundness. DETAILED DESCRIPTION
[0019] like Figures 2 to 4 The outer circle size and roundness trimming tool shown in the figure comprises a rotating block 1, a circular groove 11 is provided in the rotating block 1, a guide shaft 2 concentric with the circular groove 11 is provided in the circular groove 11, a plurality of groups of cutting heads 3 are fixedly provided on the inner circular surface of the circular groove 11, the cutting heads 3 are uniformly spaced along the circumference of the circular groove 11 with the guide shaft 2 as the center, and a gap is provided between the cutting heads 3 and the guide shaft 2. Figure 1 As shown, the forming knife of the utility model can be used to cut the outer circular edge 6 of the rightmost joint of the product to trim the outer circular size.
[0020] Preferably, in combination with the above solution, in order to better cut the joint of the product, a cutting bevel 31 is provided on the side of the cutting head 3 close to the guide shaft 2 .
[0021] Preferably, in combination with the above solution, in order to facilitate smooth feeding and prevent the cutter head from blocking, a feeding chamfer 32 is provided on the side of the cutting bevel 31 close to the entrance of the circular groove 11 .
[0022] Preferably, in combination with the above solution, in order to ensure the cutting effect, the cutting bits 3 are provided in at least two groups.
[0023] Preferably, in combination with the above solution, in order to ensure a good external cylindrical cutting processing effect, the cutting bits 3 are provided in four groups.
[0024] Preferably, in combination with the above solution, in order to facilitate processing and rotation operations, the rotating block 1 is a cylindrical structure, and the circular groove 11 is cocentric with the rotating block 1 .
[0025] Preferably, in combination with the above solution, in order to limit the length of the adaptable product joint and block the product joint for accurate processing, a limit baffle 4 is provided on the side of the rotating block 1 away from the entrance of the circular groove 11 .
[0026] Preferably, in combination with the above solution, in order to facilitate the operation of the rotating block 1 to rotate, a plurality of groups of operating handles 5 are fixedly connected to the outer side wall of the rotating block 1 .
[0027] The use of the utility model:
[0028] When using the forming knife of the utility model, the outer diameter of the joint of the plastic part can be made larger first, and then Figure 2 As shown, first put the joint of the product on the guide shaft 2 and insert it to the bottom. The joint is limited by the limiting baffle 4 to determine the cutting position, and then turn the handle 5 to drive the rotating block 1 to rotate. The blade of the cutter head 3 can cut the outer circular edge 6 of the joint, cut off the excess plastic, and trim the outer circular size.
[0029] It should be noted that all directional indications in the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0030] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or they are directly applied to other occasions without improvement, they all fall within the protection scope of the utility model.
Claims
1. A shaping knife for trimming outer circle size and roundness, characterized in that: The invention comprises a rotating block (1), wherein a circular groove (11) is arranged in the rotating block (1), wherein a guide shaft (2) concentric with the circular groove (11) is arranged in the circular groove (11), and a plurality of groups of cutting bits (3) are fixedly arranged on the inner circular surface of the circular groove (11), wherein the cutting bits (3) are arranged at even intervals along the circumference of the circular groove (11) with the guide shaft (2) as the center, and a gap is arranged between the cutting bits (3) and the guide shaft (2).
2. The outer circle size and roundness trimming and forming knife according to claim 1 is characterized in that: A cutting bevel (31) is provided on the side of the cutting head (3) close to the guide shaft (2).
3. The outer circle size and roundness trimming and forming knife according to claim 2 is characterized in that: A feed chamfer (32) is provided on one side of the cutting bevel (31) close to the inlet of the circular groove (11).
4. The outer circle size and roundness trimming and forming knife according to claim 1 or 2, characterized in that: The cutting bits (3) are provided in at least two groups.
5. The outer circle size and roundness trimming and forming knife according to claim 4 is characterized in that: The cutting bits (3) are provided in four groups.
6. The outer circle size and roundness trimming and forming knife according to claim 1, characterized in that: The rotating block (1) is a cylindrical structure, and the circular groove (11) is cocentric with the rotating block (1).
7. The outer circle size and roundness trimming and forming knife according to claim 1 is characterized in that: A limit stopper (4) is provided on the side of the rotating block (1) away from the entrance of the circular groove (11).
8. The outer circle size and roundness trimming and forming knife according to claim 1 is characterized in that: A plurality of groups of operating handles (5) are fixedly connected to the outer side wall of the rotating block (1).