A mold for forming the lower piece of an automotive front axle assembly

Abstract

This utility model relates to a molding die for the lower piece of an automotive front axle assembly. At each processing station of the lower die, a positioning groove is formed by the cooperation of a first positioning block and a second positioning block. The first positioning block includes an integrally formed fixed seat and a conical positioning post. A shaped positioning protrusion extends radially outward from the side wall of the fixed seat. The conical positioning post is located above the shaped positioning post, and its central axis is parallel to the central axis of the fixed seat. The upper die has a conical positioning groove for the conical positioning post to enter. The second positioning block has an L-shaped structure, and its other side wall has a positioning plane. This utility model uses first and second positioning blocks of different shapes for dual positioning, achieving high-precision positioning in multiple directions. By utilizing the conical positioning post in cooperation with the conical positioning groove of the upper die, relative positioning between the upper and lower dies is achieved, thus maintaining the balance of the punches within the upper die during multi-angle punching.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold for forming the lower piece of an automotive front axle assembly. Background Technology

[0002] The front axle assembly blank is a key component in the structure of the automotive front axle assembly, and its molding precision directly affects the performance of the automotive front axle assembly. Currently, there is one type of automotive front axle assembly blank, such as... Figure 1 As shown, the overall structure is X-shaped. During processing, the sheet material is pre-processed into butterfly-shaped raw material plates, which are then formed using molds. The butterfly-shaped raw material plates are as follows... Figure 2 As shown, if the butterfly-shaped raw material plate is to be processed into the lower piece of the front axle assembly, it involves multiple processes such as stamping, trimming and side punching. Not only does it require a large number of positioning structures to assist in positioning, resulting in high mold costs, but the process also involves 90° vertical stamping and 20° oblique punching. How to keep the punches balanced when the upper die is punching at multiple angles is the key to achieving high-precision processing.

[0003] Therefore, this utility model proposes a molding die for the lower piece of an automotive front axle assembly to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a mold for forming the lower piece of an automotive front axle assembly, which reduces mold costs and ensures that the punches in the upper mold remain balanced during multi-angle punching.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a mold for forming the lower piece of an automobile front axle assembly, the innovation of which is: it includes a matching upper mold and a lower mold, the lower mold is provided with a number of processing stations, and each processing station of the lower mold forms a lower piece positioning groove by the cooperation of a first positioning block and a second positioning block. The first positioning block includes an integrally formed fixed seat and a conical positioning post. The fixed seat has a first mounting hole for connecting the lower mold. The side wall of the fixed seat extends outward in the radial direction to form an irregular positioning protrusion. The butterfly-shaped raw material plate of the lower part of the front axle assembly has an arc-shaped notch for the irregular positioning protrusion to enter. The conical positioning post is located above the irregular positioning post, and the central axis of the conical positioning post is parallel to the central axis of the fixed seat. The upper mold has a conical positioning groove for the conical positioning post to enter. The second positioning block has an L-shaped structure. One side of the second positioning block has a second mounting hole for connecting the lower mold. The other side wall of the second positioning block has a positioning plane. The butterfly-shaped raw material plate of the lower part of the front axle assembly has a straight edge line that matches the positioning plane.

[0006] Furthermore, the contour line of the axial projection of the irregular positioning protrusion includes a first arc segment, a second arc segment, and a straight line segment; The two endpoints of the second arc segment are the first endpoint and the second endpoint, respectively. The line connecting the center of the second arc segment and the center of the axial projection of the fixed seat is the first reference line segment. The line connecting the center of the second arc segment and the center of the second arc segment is the second reference line segment. The second reference line segment intersects the first reference line segment at an obtuse angle, and the center of the second arc segment is located on the side of the first reference line segment closer to the first endpoint. The first arc segment is connected to the first endpoint of the second arc segment, and the first arc segment and the second arc segment have a common tangent at the first endpoint. The center of the first arc segment and the center of the second arc segment are located on both sides of the common tangent, and the radius of the first arc segment is smaller than the radius of the second arc segment. The straight line segment is connected to the second endpoint of the second arc segment, and is on the same straight line as the tangent at the second endpoint of the second arc segment.

[0007] Furthermore, the straight segment and the first circular arc segment are connected to the contour line of the axial projection of the fixed seat in an arc transition.

[0008] Furthermore, the center of the axial projection of the conical positioning post coincides with the center of the second arc segment, and the radius of the outer contour line of the axial projection of the conical positioning post is the same as the radius of the second arc segment.

[0009] Furthermore, the second positioning block has an upward-arching arc-shaped surface located above the positioning plane, with one side of the arc-shaped surface connected to the positioning plane and the other side connected to the top surface of the second positioning block.

[0010] Furthermore, the second positioning block has a chamfer on each of the left and right sides of the positioning plane.

[0011] The advantages of this utility model are: This utility model utilizes the arc-shaped notch and straight edge line of the butterfly-shaped raw material plate of the lower piece of the front axle assembly. It employs a first positioning block and a second positioning block of different shapes for dual positioning. While the positioning plane of the second positioning block overlaps with the straight edge line of the butterfly-shaped raw material plate of the lower piece for positioning, the first positioning block uses irregularly shaped positioning protrusions to cooperate with the arc-shaped notch of the lower piece to achieve high-precision positioning in multiple directions. The conical positioning post cooperates with the conical positioning groove of the upper die to achieve relative positioning between the upper and lower dies. Thus, during multi-angle punching, the punches in the upper die are kept balanced. The conical positioning post and the fixed seat with irregularly shaped positioning protrusions are integrally formed, which can effectively save space in the mold and eliminate the cumulative error of separate assembly, improving the processing accuracy of the lower piece. The standardized design of the first and second positioning blocks simplifies the wire cutting and CNC machining process and reduces the mold cost.

[0012] The irregular positioning protrusion of this utility model forms an asymmetrical structure in the shape of a crooked neck by the cooperation of a first arc segment, a second arc segment and a straight segment. This design can not only adapt to the diverse arc-shaped notches of the butterfly-shaped raw material plate of the lower part of the front axle assembly, but also break through the spatial limitations of symmetrical structures and realize multi-directional positioning function in a limited area.

[0013] The center of the axial projection of the conical positioning post of this invention coincides with the center of the second arc segment, and the radius of the outer contour line of the axial projection of the conical positioning post is the same as the radius of the second arc segment. The side of the conical positioning post is directly connected to the contour surface corresponding to the second arc segment of the irregular positioning protrusion, which facilitates the processing of the conical positioning post. At the same time, the inclined surface of the conical positioning post plays a good guiding role in the downward movement of the butterfly-shaped raw material plate of the lower part of the front axle assembly, so that the butterfly-shaped raw material plate of the lower part of the front axle assembly can move down along the inclined surface of the conical positioning post and fit against the contour surface of the irregular positioning protrusion.

[0014] This invention features an arc-shaped curved surface above the second positioning block, which facilitates the guiding of the butterfly-shaped raw material plate of the lower part of the front axle assembly into the lower part positioning groove.

[0015] The second positioning block of this invention features a chamfered design on both sides of the positioning plane, which can avoid mechanical interference with other components, reduce stress concentration at the corners, and improve the service life of the second positioning block. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a structural schematic diagram of the lower part of the front axle assembly of an automobile.

[0018] Figure 2 This is a schematic diagram of the structure of a butterfly-shaped raw material plate.

[0019] Figure 3 This is a diagram showing the station distribution on the lower mold of this utility model.

[0020] Figure 4 This is a diagram showing the arrangement of the first and second positioning blocks of the lower die at the stamping station of this utility model.

[0021] Figure 5 This is an enlarged view of point D in this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of the first positioning block of this utility model.

[0023] Figure 7 This is a top view of the first positioning block of this utility model.

[0024] Figure 8This is a bottom view of the fixing base of this utility model.

[0025] Figure 9 This is a schematic diagram of the structure of the second positioning block of this utility model. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] Example This embodiment provides a mold for forming the lower piece of an automotive front axle assembly, such as... Figure 1-9 As shown, it includes a matching upper mold and a lower mold. The lower mold has three processing stations along its length: stamping station A, trimming station B, and side punching station C. Each processing station of the lower mold forms a lower piece positioning groove through the cooperation of the first positioning block 1 and the second positioning block 2.

[0028] The first positioning block 1 includes an integrally formed fixed base 101 and a conical positioning post 103. The fixed base 101 has a first mounting hole 104 for connecting to the lower mold. The fixed base 101 is connected to the lower mold by a first bolt installed in the first mounting hole 104. The side wall of the fixed base 101 extends outward in the radial direction to form an irregular positioning protrusion 102. The butterfly-shaped raw material plate 3 of the lower part of the front axle assembly has multiple arc-shaped notches 301 for the irregular positioning protrusion 102 to enter. The conical positioning post 103 is located above the irregular positioning post 102, and the central axis of the conical positioning post 102 is parallel to the central axis of the fixed base 101. The upper mold has a conical positioning groove for the conical positioning post 103 to enter. When the upper mold and the lower mold are closed, the conical positioning post enters the corresponding conical positioning groove.

[0029] In this embodiment, the contour line of the axial projection of the irregular positioning protrusion 102 includes a first arc segment a, a second arc segment b, and a straight line segment c. The two endpoints of the second arc segment b are the first endpoint and the second endpoint, respectively. The line connecting the center of the second arc segment b with the center of the axial projection of the fixing base 101 is the first reference line segment d. The line connecting the center of the second arc segment b with the center of the second arc segment b is the second reference line segment e. The second reference line segment e intersects the first reference line segment d at an obtuse angle, and the center of the second arc segment b is located on the side of the first reference line segment d closer to the first endpoint. The first arc segment a is connected to the first endpoint of the second arc segment b, and the first arc segment a and the second arc segment b have a common tangent at the first endpoint. The center of the first arc segment a and the center of the second arc segment b are located on opposite sides of the common tangent, and the radius of the first arc segment a is smaller than the radius of the second arc segment b. The straight line segment c is connected to the second endpoint of the second arc segment b, and is on the same straight line as the tangent at the second endpoint of the second arc segment b. The straight line segment c and the first circular arc segment a are connected to the contour line of the axial projection of the fixed seat 101 in an arc transition.

[0030] The aforementioned irregular positioning protrusion 102 forms a crooked neck-shaped asymmetrical structure through the cooperation of the first arc segment a, the second arc segment b, and the straight segment c. This design can not only adapt to the diverse arc-shaped gaps of the butterfly-shaped raw material plate of the lower part of the front axle assembly, but also break through the spatial limitations of the symmetrical structure and realize multi-directional positioning function in a limited area.

[0031] In this embodiment, the center of the axial projection of the tapered positioning post 103 coincides with the center of the second arc segment b, and the radius of the outer contour line of the axial projection of the tapered positioning post 103 is the same as the radius of the second arc segment b. This design directly connects the side of the tapered positioning post to the contour surface corresponding to the second arc segment of the irregular positioning protrusion, which facilitates the processing of the tapered positioning post 103. At the same time, the inclined surface of the tapered positioning post 103 plays a good guiding role in the downward movement of the butterfly-shaped raw material plate of the lower piece of the front axle assembly, so that the butterfly-shaped raw material plate of the lower piece of the front axle assembly can move down along the inclined surface of the tapered positioning post 103 and fit against the contour surface of the irregular positioning protrusion 102.

[0032] The second positioning block 2 has an L-shaped structure. One side of the second positioning block 2 has a second mounting hole 204 for connecting to the lower mold. The second positioning block 2 is connected to the lower mold by a second bolt installed in the second mounting hole 204. The other side wall of the second positioning block 2 has a positioning plane 201. The butterfly-shaped raw material plate 3 of the lower part of the front axle assembly has a straight edge line 302 that matches the positioning plane 201. When the butterfly-shaped raw material plate 3 of the lower part of the front axle assembly is placed in the positioning groove of the lower part, the straight edge line 302 of the butterfly-shaped raw material plate 3 of the lower part of the axle assembly fits against the positioning plane 201 of the second positioning block 2.

[0033] In this embodiment, to facilitate the guiding and downward movement of the butterfly-shaped raw material plate 3 of the lower piece of the front axle assembly into the lower piece positioning groove, the second positioning block 2 has an upwardly arched arc-shaped surface 203. The arc-shaped surface 203 is located above the positioning plane, with one side connected to the positioning plane 201 and the other side connected to the top surface of the second positioning block 2. The second positioning block 2 has a chamfer 202 on each of the left and right sides of the positioning plane, which avoids mechanical interference with other components, reduces stress concentration at the corners, and improves the service life of the second positioning block.

[0034] The mold utilizes the arc-shaped notch 301 and straight edge line 302 of the butterfly-shaped raw material plate 3 of the lower part of the front axle assembly. It uses a first positioning block 1 and a second positioning block 1 of different shapes for dual positioning. While the positioning plane 201 of the second positioning block 2 overlaps with the straight edge line 302 of the lower part for positioning, the first positioning block 1 uses the irregular positioning protrusion 102 to cooperate with the arc-shaped notch 301 of the butterfly-shaped raw material plate 3 of the lower part to achieve high-precision positioning in multiple directions. The tapered positioning post 103 cooperates with the tapered positioning groove of the upper mold to achieve relative positioning between the upper and lower molds. Thus, during the multi-angle punching process, the punches in the upper mold are kept balanced. The tapered positioning post 103 and the fixed seat 101 with the irregular positioning protrusion 102 are integrally formed, which can effectively save space in the mold and eliminate the cumulative error of the separate assembly, improve the processing accuracy of the lower part. The standardized design of the first positioning block 1 and the second positioning block 2 simplifies the wire cutting and CNC machining process and reduces the mold cost.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A molding die for forming the lower piece of an automotive front axle assembly, characterized in that: It includes a matching upper mold and a lower mold. The lower mold is provided with several processing stations. Each processing station of the lower mold forms a lower piece positioning groove through the cooperation of the first positioning block and the second positioning block. The first positioning block includes an integrally formed fixed seat and a conical positioning post. The fixed seat has a first mounting hole for connecting the lower mold. The side wall of the fixed seat extends outward in the radial direction to form an irregular positioning protrusion. The butterfly-shaped raw material plate of the lower part of the front axle assembly has an arc-shaped notch for the irregular positioning protrusion to enter. The conical positioning post is located above the irregular positioning post, and the central axis of the conical positioning post is parallel to the central axis of the fixed seat. The upper mold has a conical positioning groove for the conical positioning post to enter. The second positioning block has an L-shaped structure. One side of the second positioning block has a second mounting hole for connecting the lower mold. The other side wall of the second positioning block has a positioning plane. The butterfly-shaped raw material plate of the lower part of the front axle assembly has a straight edge line that matches the positioning plane.

2. The automotive front axle assembly lower piece forming mold according to claim 1, characterized in that: The contour line of the axial projection of the irregular positioning protrusion includes a first arc segment, a second arc segment, and a straight line segment; The two endpoints of the second arc segment are the first endpoint and the second endpoint, respectively. The line connecting the center of the second arc segment and the center of the axial projection of the fixed seat is the first reference line segment. The line connecting the center of the second arc segment and the center of the second arc segment is the second reference line segment. The second reference line segment intersects the first reference line segment at an obtuse angle, and the center of the second arc segment is located on the side of the first reference line segment closer to the first endpoint. The first arc segment is connected to the first endpoint of the second arc segment, and the first arc segment and the second arc segment have a common tangent at the first endpoint. The center of the first arc segment and the center of the second arc segment are located on both sides of the common tangent, and the radius of the first arc segment is smaller than the radius of the second arc segment. The straight line segment is connected to the second endpoint of the second arc segment, and is on the same straight line as the tangent at the second endpoint of the second arc segment.

3. The automotive front axle assembly lower piece forming mold according to claim 2, characterized in that: The straight segment and the first circular arc segment are connected to the contour line of the axial projection of the fixed seat in an arc transition.

4. The automotive front axle assembly lower piece forming mold according to claim 2, characterized in that: The center of the axial projection of the tapered positioning post coincides with the center of the second arc segment, and the radius of the outer contour line of the axial projection of the tapered positioning post is the same as the radius of the second arc segment.

5. The automotive front axle assembly lower piece forming mold according to claim 1, characterized in that: The second positioning block has an upward-arching arc-shaped surface located above the positioning plane. One side of the arc-shaped surface is connected to the positioning plane, and the other side is connected to the top surface of the second positioning block.

6. The automotive front axle assembly lower piece forming mold according to claim 1, characterized in that: The second positioning block has a chamfer on each of the left and right sides of the positioning plane.

Images