Device for manufacturing hobbing cutter

Abstract

The utility model discloses a device for manufacturing a hobbing cutter, and belongs to the technical field of hobbing cutters. The device for manufacturing the hobbing cutter comprises a rotary lifting table, a cutter blank and a baffle are fixed through the rotary lifting table, cutter teeth and a cutter tooth die are connected through the baffle, the cutter teeth are shaped through the cutter tooth die, the cutter teeth are formed through cladding among the rotary lifting table, the baffle and the cutter tooth die through the cladding gun, and the cutter teeth are arranged on the rotary lifting table. The hobbing cutter has the advantages that the manufacturing difficulty of the hobbing cutter is reduced, and the manufacturing cost of the hobbing cutter is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hobbing cutter, especially to the device for hobbing cutter manufacturing. BACKGROUND

[0002] The hobbing cutter is one of the core components of the pelletizer, mainly composed of a cutter body and cutter teeth, the cutter body is made of stainless steel and mainly serves as support and transmission, the cutter teeth are evenly distributed on the surface of the cutter body in the form of micro helix and are made of special alloy material, responsible for cutting, and the cutter body and the cutter teeth are combined into one by melting.

[0003] In the prior art, the hobbing cutter has harsh working conditions, and a single material cannot meet the requirements of rigidity, toughness, hardness and the like, so the cutter teeth and the cutter body are required to be melted by different types of alloys to form an integrated structure.

[0004] For the cutter teeth of the main working surface, high hardness, high wear resistance and long service life are required, and the alloy material with such properties is generally difficult to melt with the base material, and problems such as large stress, cracks, porosity and deformation are prone to occur, and the profile of such alloy is difficult to effectively control by using conventional welding technology, so the groove profile needs to be processed in advance to limit it.

[0005] The alloy of the cutter teeth after melting has high hardness, and the hardness of the cutter teeth with good performance has approached the hardness of common processing tools, which is difficult to process, requires special customized tools, and requires several times more working hours than conventional processing to obtain the tooth profile. At the same time, due to the wide range of welding and melting of the cutter body and the cutter teeth in the early stage, a large amount of cutter body and cutter teeth material is removed during processing, and the requirements for personnel, process, equipment and detection during processing are higher than those of conventional processing to prevent cracks and deformation.

[0006] However, as a consumable part, the biggest difficulty in the manufacturing process of the hobbing cutter is to solve the contradiction between the performance and service life of the cutter and the output ratio of the high-hardness material to the subsequent forming processing required equipment, tools, process and personnel investment. In the case that the conventional welding technology cannot reduce the manufacturing cost and improve the manufacturing efficiency, the application provides a device for hobbing cutter manufacturing. SUMMARY

[0007] The device for hobbing cutter manufacturing is provided to solve the problem of high manufacturing cost of the hobbing cutter by using conventional welding technology.

[0008] To achieve the above object, the utility model adopts the following technical scheme:

[0009] The utility model provides a device for hobbing cutter manufacturing, including the rotary lifting platform, the cutter blank is fixed through the rotary lifting platform;

[0010] The baffle is used to support the cutter tooth;

[0011] The cutter tooth die is used to shape the cutter tooth;

[0012] The cladding gun is used to form the cutter tooth between the rotary lifting platform, the baffle and the cutter tooth die.

[0013] Further, the baffle is located on one side of the rotary lifting platform and at the bottom of the cutter tooth.

[0014] Further, the cutter tooth die is located above the baffle, and one end of the cutter tooth die close to the rotary lifting platform is connected with the circumferential side wall of the rotary lifting platform in a sliding fit.

[0015] Further, the cutter tooth die is located above the baffle, and one end of the cutter tooth die close to the rotary lifting platform is connected with the circumferential side wall of the rotary lifting platform in a sliding fit.

[0016] Further, the cutter tooth die is located above the baffle, and one end of the cutter tooth die close to the rotary lifting platform is connected with the circumferential side wall of the rotary lifting platform in a sliding fit.

[0017] Further, the cutter tooth die is located above the baffle, and one end of the cutter tooth die close to the rotary lifting platform is connected with the circumferential side wall of the rotary lifting platform in a sliding fit.

[0018] Compared with the prior art, the device for hobbing cutter manufacturing has the following advantages:

[0019] The device for hobbing cutter manufacturing of the utility model forms the cutter tooth by cladding the cutter blank through the cladding gun and shapes the formed cutter tooth through the cutter tooth die, thereby improving the dimensional accuracy of the formed cutter tooth, significantly improving the forming accuracy of the cutter tooth compared with the traditional 3D printing processing, reducing the post-processing process, and thereby reducing the manufacturing cost of the hobbing cutter.

[0020] Other advantages, objects and features of the utility model will be described in the subsequent specification to some extent; and to some extent, it will be obvious to those skilled in the art based on the study of the following text; or it can be taught from the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the device structure schematic view of the utility model;

[0022] Figure 2 It is the device structure schematic view of the utility model; Figure 1 It is the device structure schematic view of the utility model;

[0023] Figure 3The utility model discloses a Figure 2 The middle cutter tooth die profile effect schematic view shows that

[0024] Figure 4 The prior art structure schematic view of the hobbing cutter of the utility model discloses a

[0025] In the drawing,

[0026] 1, blank; 2, cutter tooth; 201, solidification zone; 202, crystallization zone; 203, melting zone; 3, rotary lifting platform; 4, baffle; 5, cutter tooth die; 501, cutter groove; 6, cladding gun; 7, refrigerant pipe; 8, cooling cavity. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0028] With reference to Figures 1-4 The utility model discloses a device for the manufacture of hobbing cutter, which has the following manufacturing process, and the steps are as follows:

[0029] S1, the blank 1 and the cutter tooth 2 are input into the rotary lifting platform 3 in three-dimensional model, and the corresponding action path is generated, and the rotary lifting platform 3 moves according to the action path, and the blank 1 is driven to move accordingly;

[0030] S2, the rotary lifting platform 3 and the cladding gun 6 (the cladding gun is the cladding gun of the three-dimensional additive cladding machining center) are started;

[0031] The rotary lifting platform 3 drives the blank 1 to move according to the action path generated in S2;

[0032] The cladding gun 6 clads additive on the surface position of the blank 1 inside the cutter tooth die 5, and the cutter tooth 2 is generated on the surface of the blank 1, and since the cladding material itself is constrained by the shape of the cutter tooth die 5, the shape and size of the cutter tooth 2 after forming correspond to the cutter tooth die 5, and have high precision.

[0033] The additive material composition is mainly composed of cobalt (Co), chromium (Cr), molybdenum (Mo) and iron (Fe) and the like. The typical component content is: Co 56-62%, Cr 28-32%, Mo 4-6%, Fe 3-5%.

[0034] The blank 1 is stainless steel material.

[0035] S3, the surface of the cutter tooth 2 formed in S2 is ground, and specifically, fine grinding is carried out, so that the surface of the cutter tooth 2 reaches the finished product requirement.

[0036] Corresponding

[0037] The conventional process flow is as follows:

[0038] a. Machining of cylindrical blank;

[0039] b. Machining of longitudinal tooth groove on the surface of the cylindrical blank;

[0040] c. Build-up welding of alloy material in the tooth groove until the groove is filled;

[0041] d. Milling of the blank (rough milling) to remove non-alloy material and form a rough tooth surface;

[0042] e. Fine milling of the tooth to achieve the tooth profile requirements;

[0043] f. Grinding of the tooth to further improve the accuracy and surface roughness.

[0044] The 3D printing process flow is as follows:

[0045] A. Three-dimensional solid model design of the blank 1 and the tooth 2;

[0046] B. Slice processing of the model and generation of corresponding scanning paths from cross-sectional data, input of the scanning paths into the 3D printer, and layer-by-layer printing of the tooth 2 on the surface of the blank 1 by the 3D printer;

[0047] C. Rough turning and rough grinding of the formed tooth 2 to improve the surface accuracy of the tooth 2;

[0048] D. Fine grinding of the tooth 2 to meet the product requirements.

[0049] Compared with the conventional process flow and the 3D printing process flow described above, the process flow reduces the following steps:

[0050] ① Machining of the blank 1 in the conventional process flow;

[0051] ② Slice processing of the model and generation of corresponding scanning paths from cross-sectional data in the 3D printing process.

[0052] ③ Reduction of rough turning and rough grinding.

[0053] Thus, the time cost, labor cost, material cost, and equipment cost in the manufacturing process are significantly reduced.

[0054] In S2 of the process, the tooth 2 is accelerated cooled during the process of the cladding material from the molten state to the crystalline state and then to the solidification state, so as to improve the forming speed of the tooth 2 and reduce the forming time.

[0055] The action path of S1 includes a first path in which the rotating lifting platform 3 moves along the axial direction and the circumferential direction of the blade blank 1 according to the size of the blade tooth 2.

[0056] Specifically, the rotating lifting platform 3 moves along the axial direction of the blade blank 1, so that the cladding material grows in the axial direction of the blade blank 1 (which is also the vertical direction of the blade tooth 2) in the blade groove 501, and the rotating lifting platform 3 moves along the circumferential direction of the blade blank 1 (which is also the horizontal direction of the blade tooth 2), so that the cladding material grows in the circumferential direction of the blade blank 1 in the blade groove 501.

[0057] The action path also includes a second path in which the cladding gun 6 reciprocates in the horizontal section area of the blade tooth 2 from the end close to the blade blank 1 to the end away from the blade blank 1. Since the cladding material mainly forms a thin layer structure with a certain thickness in the first path, the reciprocating movement of the cladding gun 6 close to and away from the blade blank 1 in the action along the second path enables the cladding material to protrude outward from the surface of the blade blank 1 to form the blade tooth 2.

[0058] The device for manufacturing a hob includes a rotating lifting platform 3, the blade blank 1 is fixed by the rotating lifting platform 3, the blade blank 1 is a cylindrical stainless steel structure, the axial direction of the blade blank 1 is vertical, and the blade blank 1 is driven to move up and down and rotate in the circumferential direction, so that the structure of the surface of the blade blank 1 moves in a spiral trajectory.

[0059] A baffle 4 is used to support the uncrystallized additive material that is just cladded on the surface of the blade blank 1 and prevent the additive material from falling off.

[0060] A blade tooth die 5 is used to shape the blade tooth 2.

[0061] In the 3D printing process, the base material and the cladding material are both in a molten state during the cladding process. Even if the motion trajectory of the numerical control system has no error, the molten metal cannot form a completely consistent molten pool shape, resulting in that the surface profile precision and roughness after cladding still cannot meet the requirements of direct finishing, and the excess amount of cladding material must be increased to ensure that the desired surface is finally obtained.

[0062] In the present process, the blade tooth die 5 is used to constrain the shape of the molten material, effectively control the shape of the molten material, and directly obtain the blade tooth 2 that reaches the rough machining precision and surface quality, which is several orders of magnitude higher than the 3D printing process, so that the subsequent rough machining process is omitted, and direct finishing is performed, thereby reducing the cost.

[0063] The cladding gun 6 is a cladding gun of a three-dimensional additive cladding processing center, and the additive material is cladded between the rotary lifting platform 3, the baffle 4 and the blade tooth die 5 through the cladding gun 6 to form the blade tooth 2 after cooling.

[0064] The baffle 4 is located on one side of the rotary lifting platform 3 and at the bottom of the side wall of the blade blank 1 and the blade tooth 2, and specifically, in the processing process, the blade blank 1 is on the rotary lifting platform 3, the blade tooth 2 is on the circumferential side wall of the blade blank 1, and the baffle 4 supports the initial additive material in a molten state to keep the cladding material stable before being connected to the blade blank 1.

[0065] The blade tooth die 5 is located above the baffle 4, and the end of the blade tooth die 5 close to the rotary lifting platform 3 is connected to the circumferential side wall of the rotary lifting platform 3 in a sliding fit, and in the processing process, the contact position between the blade tooth die 5 and the blade blank 1 is always changing, and the sliding connection between the blade tooth die 5 and the blade blank 1 makes the growth track of the blade tooth 2 on the surface of the blade blank 1 continuous.

[0066] The end of the blade tooth die 5 close to the rotary lifting platform 3 is provided with a blade groove 501 corresponding to the blade tooth 2 in cross section, and the blade groove 501 is a through groove with an upper and lower opening.

[0067] Specifically:

[0068] 1) The blade blank 1 is vertically installed on the rotary lifting platform 3, the blade tooth die 5 is tightly attached to the cylindrical surface of the blade blank 1, and the blade groove 501 forms a blade tooth-shaped space with the blade blank 1;

[0069] The upper part of the blade tooth-shaped space is an inlet, and the lower part is an outlet, and in the processing, the cladding gun 6 clads the additive material in the blade tooth-shaped space from the inlet;

[0070] The lower end surface of the blade blank 1 is flush with the lower end surface of the blade tooth die 5, and the baffle 4 is installed at the lower end outlet of the blade tooth die 5 to guide the crystallization.

[0071] 2) The cladding gun 6 is started to start cladding operation in the blade tooth-shaped space formed by the blade tooth die 5 and the blade blank 1 to form a molten pool.

[0072] 3) After the molten pool is formed, the rotary lifting platform 3 drives the blade blank 1 to move downward with rotation.

[0073] 4) Through the movement of the blade blank 1, the molten pool is continuously deepened in the blade tooth-shaped space. The lower part of the molten pool gradually cools down due to gradually moving away from the heat source of the cladding gun 6, and the middle part starts to solidify and crystallize to form a blade tooth;

[0074] With the continuous movement of the blade tooth die 5 relative to the blade blank 1, the molten pool is also continuously rising to form a continuous crystallization process until reaching the upper end surface of the blade blank to finally form a complete blade tooth 2;

[0075] Specifically, in this process, for example,Figure 3 As shown, the blade tooth 2 is divided into a solidification zone 201, a crystallization zone 202 and a melting zone 203 from bottom to top;

[0076] At the initial stage of cladding, the tooth-shaped space with a top opening is formed between the baffle 4 and the blade groove 501, the cladding gun 6 performs additive operation into the tooth-shaped space from the top opening, accompanied by the lifting and rotating movement of the blade blank 1 (the baffle 4 and the blade blank 1 remain relatively static), and the movement of the cladding gun 6 away from the blade blank 1, so that the cladding gun 6 can spread the additive material to the bottom of the entire tooth-shaped space, at this time the additive material in a molten state forms the melting zone 203;

[0077] Then, as the blade blank 1 and the baffle 4 continue to descend, the additive material in a molten state gradually moves away from the cladding gun 6, then crystallizes to form the crystallization zone 202, and finally solidifies to form the solidification zone 201;

[0078] Continuing to descend with the blade blank 1 and the baffle 4, in the blade tooth space, the solidification zone 201 is supported at the bottom of the blade groove 501, the crystallization zone 202 is above the solidification zone 201, and the melting zone 203 is above the crystallization zone, until the blade tooth 2 grows upward to the top end of the blade blank 1.

[0079] 5) The form of the blade tooth mold can be single, forming one blade tooth at a time, or multiple, forming multiple blade teeth at a time.

[0080] Inside the blade tooth mold 5, a cooling structure for forced cooling can be provided, which actively cools and dissipates heat to achieve the effect of rapid crystallization and solidification of the cladding material.

[0081] Specifically, the cooling structure includes a cooling cavity 8 opened in the inside of the blade tooth mold 5, and a refrigerant pipe 7 communicating with the cooling cavity 8. The refrigerant pipe 7 has two ends communicating with the cooling cavity 8, and the cooling cavity 8 is located outside the blade groove 501. The refrigerant is introduced into the cooling cavity 8 through the refrigerant pipe 7, and the heat of the molten material is transferred to the refrigerant through the blade tooth mold 5, which is carried away by the refrigerant to achieve the cooling effect.

[0082] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

[0083] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0084] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. An apparatus for manufacturing a hob, characterized in that, The rotary lifting platform (3) is used for fixing the cutter blank (1); The baffle (4) is used for receiving the cutter tooth (2); The cutter tooth die (5) is used for shaping the cutter tooth (2); The cladding gun (6) is used for cladding to form the cutter tooth (2) between the rotary lifting platform (3), the baffle (4) and the cutter tooth die (5).

2. The apparatus for manufacturing a hob according to claim 1, wherein The baffle (4) is located on one side of the rotary lifting platform (3) and at the bottom of the cutter tooth (2).

3. The apparatus for manufacturing a hob according to claim 1, wherein The cutter tooth die (5) is located above the baffle (4), and one end of the cutter tooth die (5) close to the rotary lifting platform (3) is connected with the circumferential side wall of the rotary lifting platform (3) in a sliding fit.

4. The apparatus for roll cutting tool manufacturing of claim 2, wherein, The one end of the cutter tooth die (5) close to the rotary lifting platform (3) is provided with a cutter groove (501) with a cross section corresponding to the cutter tooth (2), and the cutter groove (501) is an upper and lower opening through groove.

5. The apparatus for roll cutting tool manufacturing of claim 1, wherein, The cutter tooth die (5) is provided with a cooling structure inside.

6. The apparatus for roll cutting tool manufacturing according to claim 5, wherein The cooling structure comprises a cooling cavity (8) provided in the inside of the cutter tooth die (5) and a refrigerant pipe (7) communicated with the cooling cavity (8).

Images