Fine expanding die for rim

Abstract

The invention relates to a rim fine expanding die which comprises two half dies, molded surfaces are arranged on the half dies, when the two half dies are mutually spliced, the molded surfaces on the two half dies are spliced to form a die molded surface, each half die comprises a main body part and a forming part, and the main body part is used for being connected with a die expanding machine; the forming part is detachably connected with the main body part, and at least part of the section, in the axial direction, of the molded surface is arranged on the forming part. The half die is designed to comprise the main body part and the forming part, different forming parts can be replaced to meet die expanding machining requirements of different products, only the forming parts need to be replaced when the machined products are replaced, compared with replacement of the whole die, replacement of the forming parts is more convenient, debugging work does not need to be conducted on the main body part, and the machining efficiency is improved. Production and processing can be directly carried out, and the production rhythm and efficiency are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of automobile parts manufacturing technology, and in particular to a wheel rim precision expansion die. Background Art

[0002] The processing of steel wheel rims generally involves key processes such as rolling and expansion. The diameter and profile size of the rolled rims are smaller than the product design requirements. Through the rim profile expansion process, the expansion die is used to expand the wheel rim shape, diameter, and runout to meet the design requirements.

[0003] In the related art, the rim precision expansion mold is composed of multiple mold units, which are spliced ​​to form a precision expansion mold with an outer circular contour that matches the contour of the rim to be processed. Each mold unit is also divided into two upper and lower half molds (also called a movable mold and a fixed mold).

[0004] At present, for rim products with different contours, the corresponding designed mold unit profiles are also different. Every time the processed product is changed, the mold unit needs to be completely dismantled and a new mold unit needs to be reinstalled. The mold unit removal and installation operations are relatively complicated, and after the installation is completed, it needs to be re-debugged to ensure accuracy, which takes a lot of time and affects the production rhythm. Summary of the invention

[0005] Based on the above description, the present invention provides a wheel rim precision expansion mold to solve the problem in the related art that each time the processed product is changed, the mold unit needs to be completely dismantled and a new mold unit needs to be reinstalled. The mold unit removal and installation operations are relatively complicated, and after the installation is completed, it needs to be re-debugged to ensure accuracy, which takes a lot of time and affects the production rhythm.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: The present application provides a wheel rim precision expansion die, and the technical solution adopted is as follows: A wheel rim precision expansion die, comprising: Two half molds, each of which is provided with a molding surface, and when the two half molds are spliced ​​together, the molding surfaces on the two half molds are spliced ​​to form a mold molding surface; The half mold includes a main body and a forming part: The main body is used to connect with the mold expansion machine; The forming portion is detachably connected to the main body portion, and at least a partial section of the molding surface in the axial direction is arranged on the forming portion.

[0007] Preferably, the main body is provided with a mounting groove for the molding part to be embedded, and the molding surface on the half mold includes a fixed section and an adjustable section in the axial direction, the fixed section is provided on the main body, and the adjustable section is provided on the molding part, and when the molding part is embedded in the mounting groove and connected to the main body, the adjustable section and the fixed section are connected to each other.

[0008] Preferably, when the two half-moulds are spliced ​​together, the adjustable sections of the two moulding surfaces engage with each other.

[0009] Preferably, the forming portion is fixed to the main body portion by bolts.

[0010] Preferably, the mounting groove includes a radial supporting side wall and an axial supporting side wall, the axial supporting side wall is parallel to the joint surface of the two half molds joined together, and the axial supporting wall is provided with a threaded hole, and the forming part is provided with a bolt hole along the axial direction of the forming surface, and when the forming part is embedded in the mounting groove, it fits with the radial supporting side wall and the axial supporting side wall, and the bolt hole is coaxial with the threaded hole.

[0011] Preferably, a pin hole is provided on the joint surface where the two half molds are spliced ​​together, the axis of the pin hole is perpendicular to the joint surface, and the two pin holes are coaxial and connected when the two half molds are spliced, and a guide pin is provided in one of the pin holes.

[0012] Preferably, the pin hole is provided on the main body.

[0013] Preferably, a spring groove for inserting an annular spring of the mold expansion machine is provided on the joint surfaces where the two half molds are joined together.

[0014] Compared with the prior art, the technical solution of the present application has at least the following beneficial technical effects: 1. The present application designs the half mold to include a main body and a molding part, wherein the main body is the part connected to the mold expansion machine, which is driven to perform the mold expansion action after being installed on the mold expansion machine, and the main body drives the molding part to move, and the molding surface cooperates with the product molding surface to complete the mold expansion process during the movement of the mold. Since the molding part and the main body can be detachably connected, and at least part of the section of the molding surface in its axial direction is arranged on the molding part, in actual design, according to the molding surface of different products, all the molding surfaces on the mold that cooperate with the product molding surface can be designed on the molding part, so as to adapt to the mold expansion processing needs of different products by replacing different molding parts; or for different products with the same section of the molding surface, the molding surface section on the mold that adapts to the same section of the product can be designed on the main body, and the molding surface section that adapts to different sections of the product can be designed on the molding part, and the mold expansion processing needs of different products can also be adapted by replacing different molding parts. When changing the processed product, only the forming part needs to be replaced. Compared with replacing the entire mold, the replacement of the forming part is more convenient, and there is no need to debug the main part. Production and processing can be carried out directly to ensure production rhythm and efficiency.

[0015] 2. The present application provides an installation groove on the main body for the molding part to be embedded and installed, and the molding part is connected to the main body by bolts, so that the replacement of the molding part can be completed quickly and the installation accuracy of the molding part can be guaranteed.

[0016] 3. In the present application, the bolt holes on the forming part are arranged along the axial direction of the forming surface, so that the bolt holes will not affect the forming surface, thereby ensuring the accuracy of the forming surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of a wheel rim precision expansion mold provided by an embodiment of the present invention; Figure 2 A schematic diagram of the cooperation between the wheel rim precision expansion mold and the wheel rim product provided in an embodiment of the present invention.

[0018] Description of reference numerals: 1. Half mold; 11. Main body; 111. Mounting groove; 112. Threaded hole; 12. Forming part; 121. Bolt hole; 13. Profile; 131. Fixed section; 132. Adjustable section; 14. Pin hole; 15. Guide pin; 16. Spring groove. DETAILED DESCRIPTION

[0019] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0021] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0022] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. The "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0023] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0024] Reference Figure 1-2 As shown, an embodiment of the present application provides a rim expansion mold, including two half molds 1, each half mold 1 is provided with a molding surface 13, and when the two half molds 1 are spliced ​​together, the molding surfaces 13 on the two half molds 1 are spliced ​​to form a mold molding surface.

[0025] Reference Figure 1-2 As shown, specifically, the two half molds 1 are an upper mold and a lower mold respectively. The two half molds 1 are spliced ​​together to form a mold unit, and the molding surfaces 13 of the two half molds 1 are spliced ​​together to form a mold molding surface. During actual processing, multiple mold units are spliced ​​together, and multiple mold molding surfaces are spliced ​​together to form a complete product molding surface.

[0026] Reference Figure 1-2 As shown, further, the half mold 1 includes a main body 11 and a molding part 12, the main body 11 is used to connect with the mold expansion machine, the molding part 12 is detachably connected to the main body 11, and the molding surface 13 is at least partially arranged on the molding part 12 in the axial direction. Among them, since the molding surface 13 is designed based on the shape of the rim, the rim as a whole is cylindrical with a variable axial diameter, that is, the molding surface 13 is an arc shape with a variable diameter in the axial direction.

[0027] Specifically, the main body 11 is used as the connecting part between the half mold 1 and the mold expander. According to the actual installation requirements on the mold expander, the main body 11 can be provided with corresponding installation holes and other structures. After the molding part 12 is installed on the mold expander, it is driven by the driving mechanism of the mold expander to perform the mold expansion action. The molding part 12 is the part that mainly cooperates with the product. According to the profile 13 of different products, all the profiles 13 on the mold that cooperate with the product profile can be designed on the molding part 12, or for different products with the same section of the profile 13, the profile 13 sections on the mold that adapt to the same section of the product can be designed on the main body 11, and the profile 13 sections that adapt to different sections of the product can be designed on the molding part 12, so that the molding part 12 and the main body 11 cooperate to perform the mold expansion action under the drive of the mold expander, and the profile 13 cooperates with the product profile to complete the mold expansion processing of the product during the mold expansion action. Since the molding part 12 is detachably connected to the main body 11, different molding parts 12 can be replaced to adapt to the mold expansion processing needs of different products. When changing the processed product, only the molding part 12 needs to be replaced. Compared with replacing the entire half mold 1, the replacement of the molding part 12 is more convenient, and there is no need to debug the main body 11. Production and processing can be carried out directly to ensure production rhythm and efficiency.

[0028] Reference Figure 1-2 As shown, in this embodiment, the molding surface 13 on the half mold 1 includes a fixed section 131 and an adjustable section 132 in the axial direction. The fixed section 131 is arranged on the main body 11, and the adjustable section 132 is arranged on the molding part 12. At the same time, a mounting groove 111 for the molding part 12 to be embedded is provided on the main body 11. When the molding part 12 is embedded in the mounting groove 111 and connected to the main body 11, the adjustable section 132 of the molding surface 13 is connected with the fixed section 131.

[0029] Specifically, the mounting groove 111 can play a role in positioning the molding portion 12 so as to quickly and accurately install the molding portion 12 on the main body 11. In addition, the setting of the mounting groove 111 can ensure that the fixed section 131 of the molding surface 13 on the main body 11 and the adjustable section 132 on the molding portion 12 form an accurate connection, thereby ensuring the accuracy of the molding surface 13.

[0030] Reference Figure 1-2As shown, further, when the two half molds 1 are spliced ​​together, the adjustable sections 132 of the two molding surfaces 13 are connected to each other. Specifically, the mounting groove 111 is set to pass through one side of the splicing surface of the two half molds 1 spliced ​​together, that is, when the two half molds 1 are spliced ​​together, the mounting grooves 111 thereon are connected to each other, and correspondingly, the two molding parts 12 are spliced ​​together, so that the adjustable sections 132 of the molding surfaces 13 on the two molding parts 12 are connected to each other.

[0031] Reference Figure 1-2 As shown, the mounting groove 111 includes a radial support side wall and an axial support side wall. The axial support side wall is parallel to the joint surface of the two half molds 1, and a threaded hole 112 is provided on the axial support wall. The forming part 12 is provided with a bolt hole 121 along the axial direction of the molding surface 13. When the forming part 12 is embedded in the mounting groove 111, it fits with the radial support side wall and the axial support side wall, and the bolt hole 121 is coaxial with the threaded hole 112. The radial support wall is used to radially support the forming part 12. When the mold is expanded through the mold, the radial support part bears the radial pressure along the molding surface 13 on the forming part 12. The axial support wall is used to support the forming part 12 in the axial direction and provide a mounting position for the forming part 12. Among them, the bolt holes 121 on the forming part 12 pass through the axial ends of the molding surface 13. During installation, bolts are inserted from the splicing surface of the half mold 1, and the forming part 12 is fixed to the main body 11 by the bolts, so that the replacement operation of the forming part 12 is simple and can be completed quickly. The position of the bolt hole 121 does not affect the accuracy of the molding surface 13 on the molding part 12, thereby ensuring the matching accuracy of the molding surface 13 and the product, and ensuring the processing accuracy.

[0032] Reference Figure 1-2 As shown, further, a pin hole 14 is provided on the joint surface of the two half molds 1, the axis of the pin hole 14 is perpendicular to the joint surface, and the two pin holes 14 are coaxial and connected when the two half molds 1 are joined, and a guide pin 15 is provided in one of the pin holes 14. Specifically, the pin hole 14 is provided on the main body 11, and the function of the pin hole 14 is to cooperate with the guide pin 15, and when processing the product, the two half molds 1 play a guiding role when the molds are closed, so as to ensure the joint accuracy of the two half molds 1.

[0033] Reference Figure 1-2 As shown, further, the joint surfaces of the two half molds 1 are provided with spring grooves 16 for the annular spring of the mold expander to be embedded in. Specifically, the spring grooves 16 are also provided on the main body 11, which provide installation space for the annular spring of the mold expander.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rim precision expansion die, characterized in that: include: Two half molds (1), each of which is provided with a molding surface (13), and when the two half molds (1) are spliced ​​together, the molding surfaces (13) on the two half molds (1) are spliced ​​together to form a mold molding surface; The half mold (1) comprises a main body portion (11) and a molding portion (12); The main body (11) is used to connect with a mold expansion machine; The forming part (12) is detachably connected to the main body (11), and at least a partial section of the molding surface (13) in its axial direction is arranged on the forming part (12).

2. The wheel rim precision expansion mold according to claim 1, characterized in that: The main body (11) is provided with a mounting groove (111) for the molding part (12) to be embedded in. The molding surface (13) on the half mold (1) comprises a fixed section (131) and an adjustable section (132) in the axial direction. The fixed section (131) is provided on the main body (11), and the adjustable section (132) is provided on the molding part (12). When the molding part (12) is embedded in the mounting groove (111) and connected to the main body (11), the adjustable section (132) and the fixed section (131) are connected to each other.

3. The wheel rim precision expansion mold according to claim 2, characterized in that: When the two half molds (1) are spliced ​​together, the adjustable sections (132) of the two molding surfaces (13) are connected to each other.

4. The wheel rim precision expansion mold according to claim 2, characterized in that: The forming part (12) is fixed to the main body part (11) by means of bolts.

5. The wheel rim precision expansion die according to claim 4, characterized in that: The mounting groove (111) comprises a radial supporting side wall and an axial supporting side wall, the axial supporting side wall is parallel to the joint surface of the two half molds (1) that are joined together, and the axial supporting wall is provided with a threaded hole (112), the forming portion (12) is provided with a bolt hole (121) along the axial direction of the molding surface (13), and when the forming portion (12) is embedded in the mounting groove (111), it fits with the radial supporting side wall and the axial supporting side wall, and the bolt hole (121) is coaxial with the threaded hole (112).

6. The wheel rim precision expansion mold according to claim 1, characterized in that: A pin hole (14) is provided on the joint surface where the two half molds (1) are joined together, the axis of the pin hole (14) is perpendicular to the joint surface, and when the two half molds (1) are joined together, the two pin holes (14) are coaxial and connected, and a guide pin (15) is provided in one of the pin holes (14).

7. The wheel rim precision expansion die according to claim 6, characterized in that: The pin hole (14) is arranged on the main body (11).

8. The wheel rim precision expansion mold according to claim 1, characterized in that: The joint surfaces of the two half molds (1) that are joined together are provided with a spring groove (16) for the annular spring of the mold expansion machine to be embedded.

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