Forming die and method for thin plate type precise pendulum part

Abstract

The invention provides a forming die and method for a thin plate type precise pendulum part. The forming die comprises an upper die assembly and a lower die assembly. The lower die assembly comprises a first supporting assembly, a second supporting assembly, a female die, an insert, a sliding wedge block and a fixed wedge block. The first supporting assembly and the second supporting assembly are selectively placed on the female die; the female die is provided with a first through hole for placing an insert; the upper surface of the fixed wedge block is a slope surface, the lower surface of the sliding wedge block is a slope surface, and the sliding wedge block slides relative to the slope surface of the fixed wedge block; the sliding wedge block is provided with a first station and a second station, and when the sliding wedge block is located at the first station, the forming die is used for part forming; and when the sliding wedge block is located at the second station, the forming die is used for trimming the part. According to the forming die and method designed by the invention, preliminary forming and appearance trimming of the thin plate type precise pendulum part can be completed in the same die through one-time machining, and the machining efficiency is high; and obtained parts are high in precision and high in percent of pass.

Description

Technical Field

[0001] The invention belongs to the technical field of high-precision pendulum parts, and in particular relates to a molding die and a molding method for thin-plate precision pendulum parts. Background Art

[0002] At present, a thin plate type precision pendulum type part (such as the attached Figure 7 As shown), the blank parts used for processing (as shown in the attached Figure 6 As shown in the figure, the thickness is 1 mm. It is necessary to process the specific position into a part with a thickness of 0.24 mm and cut the excess part. Using traditional mechanical processing methods to form it, due to the small size of the parts, high processing precision, and difficult positioning, the parts are prone to warping and deformation during the processing, making it difficult to ensure the final accuracy of the parts. The whole process is labor-intensive, time-consuming, and labor-intensive, and the qualified rate of the produced parts is low, which greatly restricts the processing. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems in the prior art that thin plate precision pendulum parts are difficult to process, the processing process is labor-intensive and time-consuming, and the pass rate is low, and a molding mold and method for thin plate precision pendulum parts are provided.

[0004] To achieve the above purpose, the technical solution provided by the present invention is:

[0005] Provided is a forming die for thin plate precision pendulum parts, comprising an upper die assembly arranged on an upper die plate of a ball rolling die frame and a lower die assembly arranged on a lower die plate of the ball rolling die frame; the upper die assembly comprises a male die, which is mounted on the upper die plate of the ball rolling die frame; the lower die assembly comprises a supporting assembly, a female die, an insert, a sliding wedge and a fixed wedge arranged in sequence from top to bottom; the supporting assembly is provided with two groups, namely a first supporting assembly and a second supporting assembly, the first supporting assembly and the second supporting assembly respectively comprising two cushion blocks of the same thickness, the first supporting assembly and the second supporting assembly can be selectively placed on the upper surface of the female die, and the height of the cushion blocks in the first supporting assembly is greater than the height of the cushion blocks in the second supporting assembly; the female die is mounted on the lower die plate of the ball rolling die frame, the female die is provided with a first through hole located directly below the male die, the first through hole is used to place the insert; The cross section matches the first through hole; the fixed wedge is fixedly connected to the lower template on the ball mold frame, the upper surface of the fixed wedge is a slope, and the lower surface of the sliding wedge is a slope that matches the upper surface of the fixed wedge; the sliding wedge is located between the female mold and the fixed wedge, and the sliding wedge slides relative to the slope of the fixed wedge; the sliding wedge has a first station located at the top of the slope of the fixed wedge and a second station located at the bottom of the slope of the fixed wedge; the lower end surface of the insert abuts against the upper surface of the sliding wedge; when the sliding wedge is located at the first station, the upper surface of the female mold is placed on the first supporting assembly, the upper surface of the insert is flush with the upper surface of the female mold, and the molding mold is used for part molding; when the sliding wedge is located at the second station, the upper surface of the female mold is placed on the second supporting assembly, the insert descends along the first through hole, the lower surface of the insert is lower than the upper surface of the female mold, and the molding mold is used for part trimming.

[0006] Furthermore, limit blocks are respectively installed on both sides of the female mold to limit the moving distance of the sliding wedge block.

[0007] Furthermore, handles are installed on both ends of the sliding wedge block, and a mounting hole through which the handles pass is provided on the limit block.

[0008] Furthermore, the slope of the fixed wedge block is 6 to 8 degrees.

[0009] Furthermore, the height of the pad in the first supporting assembly is 1 to 2 mm higher than the height of the pad in the second supporting assembly.

[0010] Furthermore, it also includes a push rod, a second through hole is provided in the middle of the sliding wedge block, a third through hole is provided in the middle of the fixed wedge block, and the push rod extends into the third through hole and the second through hole in sequence from bottom to top to eject the formed parts.

[0011] Furthermore, a positioning circular hole is provided on the part blank, and the insert is provided with a positioning pin and a stepped hole for installing the positioning pin.

[0012] Furthermore, the part blank is a T-shaped part, the male mold and the insert are both T-shaped blocks with a T-shaped cross-section, the first through hole is a T-shaped hole, and two arc grooves are symmetrically arranged with the center line of the stepped hole as the symmetry axis in the middle of the upper surface of the insert, and the cross-sectional size of the insert is the same as that of the male mold.

[0013] A method for forming a thin plate precision pendulum-type part is also provided, which is applied to a forming mold and comprises the following steps:

[0014] Step 1: Install the male mold and the lower mold assembly on the ball bearing mold frame respectively, and use the hydraulic press as the power source of the ball bearing mold frame;

[0015] Step 2: Move the sliding wedge to the first station, align the long side of the part blank with the long side of the first through hole, and position it through the positioning pin, install the part blank on the female mold, and place the first support assembly on the upper surface of the female mold. The two pads in the first support assembly are placed on the upper surface of the female mold. The distance between the two pads in the first support assembly after installation is greater than the length of the part blank;

[0016] Step 3: Control the hydraulic press to close the forming mold, move the male mold downward to contact the first supporting assembly, extrude the part blank, and complete the part forming process;

[0017] Step 4: Control the hydraulic press to open the molding die, move the sliding wedge to the second station, replace the first support assembly with the second support assembly, and place the second support assembly in the same position as the first support assembly;

[0018] Step 5: Control the hydraulic press to close the forming mold, and move the male mold downward to contact the second supporting assembly to complete the trimming process of the part;

[0019] Step 6: Control the hydraulic press to open the molding die and eject the parts.

[0020] The advantages of the present invention are:

[0021] The forming mold and method designed in the present invention enable the preliminary forming and outer shape trimming of thin plate precision pendulum parts to be completed in one process in the same mold, and the processing efficiency is high; because the female mold, insert, male mold and other components have good machinability, high-precision shape and position tolerances and high-precision dimensions can be processed, so the thin plate precision pendulum parts processed by the forming mold have high precision and high pass rate, saving processing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The features and advantages of the present invention will become more readily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and in which some features are exaggerated or minimized to show details of particular components:

[0023] Figure 1 is a schematic diagram of the assembly of a molding die in an embodiment of the present invention;

[0024] Figure 2 is a cross-sectional view of a male mold in an embodiment of the present invention;

[0025] Figure 3 is a top view of the male mold in an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional view of an insert in an embodiment of the present invention;

[0027] Figure 5 is a top view of an insert in an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of a part blank in an embodiment of the present invention;

[0029] Figure 7 It is a schematic diagram of product parts in an embodiment of the present invention.

[0030] In the figure: 1-male mold; 2-locating pin; 3-pad; 4-female mold; 5-insert; 6-sliding wedge; 7-fixed wedge; 8-thrust rod; 9-handle; 10-limiting block. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration, and is not intended to limit the present invention.

[0032] A forming die for thin plate precision pendulum parts, such as Figure 1 As shown, it includes an upper mold assembly arranged on the upper mold plate of the ball mold frame and a lower mold assembly arranged on the lower mold plate of the ball mold frame; the upper mold assembly includes a male mold 1, which is mounted on a fixed plate, and the fixed plate is mounted on the upper mold plate of the ball mold frame through cylindrical pins and screws. The ball mold frame is a basic structure of the mold, which is used to provide a stable platform, and its upper mold plate can move closer to or away from the lower mold plate along the guide column, thereby driving the male mold 1 away from or close to the lower mold assembly. The ball mold frame has high precision, reliable guidance and smooth movement, which can meet the high precision requirements of product parts.

[0033] like Figure 1 As shown, the lower mold assembly includes a support assembly, a female mold 4, an insert 5, a sliding wedge 6, a fixed wedge 7 and a push rod 8 which are arranged in sequence from top to bottom.

[0034] The support assembly is provided with two groups, namely the first support assembly and the second support assembly. The first support assembly and the second support assembly respectively contain two cushion blocks 3 of the same size. The first support assembly and the second support assembly can be selectively placed on the upper surface of the female mold 4, and the height of the cushion block 3 in the first support assembly is greater than the height of the cushion block 3 in the second support assembly. Specifically, the distance between the two cushion blocks 3 in the first support assembly after installation is greater than the length of the part blank; the first support assembly is used to control the thickness of the product part during preliminary molding, and the thickness of the cushion block 3 in the first support assembly is determined by trial molding; the second support assembly is used for trimming after preliminary molding, and the thickness of the cushion block 3 in the second support assembly is 1 to 2 mm thinner than the cushion block 3 in the first support assembly.

[0035] like Figure 1 As shown, the female mold 4 is installed on the lower mold plate of the ball mold frame. The female mold 4 is provided with a first through hole located directly below the male mold 1. The first through hole is used to place the insert 5. The cross-section of the male mold 1 matches the first through hole and is consistent with the required shape of the product part. A positioning circular hole is provided on the part blank, and the insert 5 is provided with a positioning pin 2 and a stepped hole for installing the positioning pin 2. The male mold 1 is provided with a stepped hole for moving the positioning pin 2, and the small aperture end of the stepped hole on the male mold 1 is close to the small aperture end of the stepped hole on the insert 5.

[0036] In this embodiment, Figures 2 to 5 As shown, the part blank is a T-shaped part, the male mold 1 and the insert 5 are both T-shaped blocks with a T-shaped cross section; the first through hole is a T-shaped hole; the middle of the upper surface of the insert 5 is provided with two arc grooves symmetrically arranged with the center line of the stepped hole as the symmetry axis, and the cross-sectional dimensions of the insert 5 are the same as those of the male mold 1. Figure 3 , 6 As shown, the cross-sectional shape of the male mold 1 and the cross-sectional shape of the insert 5 are consistent with the cross-sectional shape of the part blank, and the cross-sectional size of the male mold 1 is smaller than the cross-sectional size of the part blank, so that the part blank can be extruded and formed, and finally the redundant edges can be cut. Among them, the dimensional tolerance and form and position tolerance of the male mold 1 are one-third of the dimensional tolerance and form and position tolerance required for the product parts; the form and position tolerance of the T-hole is one-third of the form and position tolerance of the product parts; the outer dimensions of the insert 5 are tightly matched and slidable according to the dimensions of the female mold 4; the processing datum of the arc groove is the same as the datum of the product parts; the dimensional tolerance and position tolerance of the insert 5 are one-third of the tolerance of the product parts; the male mold 1 and the T-hole are tightly and slidable.

[0037] A second through hole is provided in the middle of the sliding wedge block 6, and a third through hole is provided in the middle of the fixed wedge block 7. The push rod 8 extends into the third through hole and the second through hole in sequence from bottom to top, so as to push the formed parts out of the upper surface of the female mold 4; the diameter of the second through hole is larger than the diameter of the third through hole, so as to avoid the upper end of the push rod 8 still being able to pass through the sliding wedge block 6 to push the formed parts out of the first through hole when the sliding wedge block 6 is not directly below the female mold 4.

[0038] like Figure 1 As shown, the fixed wedge block 7 is fixedly connected to the lower mold plate on the ball mold frame by screws; the upper surface of the fixed wedge block 7 is a slope, and the lower surface of the sliding wedge block 6 is a slope that is inclined downward and cooperates with the upper surface of the fixed wedge block 7; the slope of the fixed wedge block 7 has an inclination of 6 to 8°, preferably 7°, and the slope of the fixed wedge block 6 is a self-locking angle. When vertical force is applied, the sliding wedge block 6 will not slide.

[0039] The sliding wedge 6 is located between the female mold 4 and the fixed wedge 7, and the sliding wedge 6 slides relative to the fixed wedge 7; the sliding wedge 6 has a first station located at the top of the slope of the fixed wedge 7 and a second station located at the bottom of the slope of the fixed wedge 7; the lower end surface of the insert 5 abuts against the upper surface of the sliding wedge 6.

[0040] When the sliding wedge 6 is located at the first station, the first supporting assembly is placed on the upper surface of the female mold 4, the upper surface of the insert 5 is flush with the upper surface of the female mold 4, and the molding mold is used for part molding.

[0041] When the sliding wedge 6 is located at the second station, the second supporting assembly is placed on the upper surface of the female mold 4, the insert 5 descends along the first through hole, the lower surface of the insert 5 is lower than the upper surface of the female mold 4, and the molding mold is used for part trimming.

[0042] Limit blocks 10 are respectively installed on both sides of the female mold 4 to limit the moving distance of the sliding wedge 6; handles 9 are installed on both ends of the sliding wedge 6, and the handle 9 and the sliding wedge 6 are interference fit. By applying force to the handle 9, the sliding wedge 6 is moved on the fixed wedge 7. The limit block 10 is provided with a mounting hole through which the handle 9 passes. The mounting hole is a vertical elliptical hole. By knocking, the handle 9 is moved relative to the mounting hole.

[0043] This embodiment also provides a method for forming a thin plate precision pendulum-type part, which is applied to a forming mold and includes the following steps:

[0044] Step 1: Install the male mold 1 and the lower mold assembly on the ball bearing mold frame respectively, and use a hydraulic press as a power source for the ball bearing mold frame;

[0045] Step 2: Use a copper rod to gently tap the handle 9 to drive the sliding wedge 6 to move forward on the fixed wedge 7, so that the insert 5 moves to the first station, so that the long side of the part blank is parallel to the long side of the first through hole, and is positioned by the positioning pin 2. The part blank is provided with a circular hole, and the positioning pin 2 passes through the circular hole and is installed on the two stepped holes. The part blank is positioned and installed on the female mold 4, and the first support assembly is placed on the upper surface of the female mold 4. The two pads 3 in the first support assembly are placed at both ends of the upper surface of the female mold 4 with the center line of the stepped hole as the symmetry axis. The distance between the two pads 3 in the first support assembly after installation is greater than the length of the part blank;

[0046] Step 3: Control the hydraulic press to close the forming mold, that is, use the ball mold frame to adjust the gap between the male mold assembly and the lower mold assembly, and move the male mold 1 downward to contact the first support assembly, so that the male mold 1 squeezes the part blank downward to complete the part forming process;

[0047] Step 4: Control the hydraulic press to remove the pressure of the hydraulic press on the ball bearing die frame, open the forming mold, and tap the handle 9 to push the sliding wedge 6 to move in the opposite direction on the fixed wedge 7, so that the insert 5 moves to the second station, and replace the first support assembly with the second support assembly. The placement position of the second support assembly is the same as that of the first support assembly;

[0048] Step 5: Control the hydraulic press to close the forming mold, use the hydraulic press to apply pressure to the upper plate of the ball bearing mold frame, the male mold 1 moves downward to contact the second support assembly, and the lower surface of the male mold 1 moves downward to the first through hole, and by cooperating with the first through hole, the excess material is cut off to complete the trimming process of the part;

[0049] Step 6: Control the hydraulic press to open the molding die, and use the ejector pin 8 to eject the part.

[0050] Among them, in step 2, when the insert 5 moves to the first station, the upper surface of the insert 5 is flush with the upper surface of the female mold 4; in step 5, when the insert 5 moves to the second station, the sliding wedge 6 moves horizontally by 3 to 5 mm.

[0051] This embodiment uses a molding die and method to Figure 6 The 1mm thick part blank shown is extruded into a thickness of 0.24mm, and the excess thickness is cut off to obtain the following Figure 7 Product parts shown.

[0052] The molding mold and method designed in this embodiment enable the preliminary molding and outer trimming of thin plate precision pendulum parts to be completed in one processing in the same mold, and the processing efficiency is high. Because the components such as the female mold 4, the insert 5, and the male mold 1 have good machinability, high-precision form and position tolerances and high-precision dimensions can be processed. Therefore, the thin plate precision pendulum parts processed by the molding mold have high precision and high pass rate. Since the components such as the female mold 4, the male mold 1 and the insert 5 have high hardness, the service life of this mold is long, saving processing costs in many aspects.

[0053] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the present invention may be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or substituted for the corresponding features in other implementations. The technical solutions obtained by these combinations or substitutions shall also be deemed to be included in the protection scope of the present invention.

Claims

1. A forming die for thin plate precision pendulum parts, characterized in that: It includes an upper mold assembly arranged on an upper mold plate of a ball bearing mold frame and a lower mold assembly arranged on a lower mold plate of the ball bearing mold frame; The upper mold assembly comprises a male mold (1), and the male mold (1) is mounted on the upper mold plate of the ball mold frame; The lower mold assembly comprises a support assembly, a female mold (4), an insert (5), a sliding wedge (6) and a fixed wedge (7) which are arranged in sequence from top to bottom; The support assembly is provided with two groups, namely a first support assembly and a second support assembly, the first support assembly and the second support assembly respectively comprising two cushion blocks (3) with the same thickness, the first support assembly and the second support assembly can be selectively placed on the upper surface of the female mold (4), and the height of the cushion block (3) in the first support assembly is greater than the height of the cushion block (3) in the second support assembly; The female mold (4) is mounted on the lower mold plate of the ball mold frame, and the female mold (4) is provided with a first through hole located directly below the male mold (1), and the first through hole is used to place the insert (5); the cross section of the male mold (1) matches the first through hole; The fixed wedge block (7) is fixedly connected to the lower mold plate on the ball mold frame, the upper surface of the fixed wedge block (7) is a slope surface, and the lower surface of the sliding wedge block (6) is a slope surface that matches the upper surface of the fixed wedge block (7); The sliding wedge (6) is located between the female mold (4) and the fixed wedge (7), and the sliding wedge (6) slides relative to the slope of the fixed wedge (7); the sliding wedge (6) has a first station located at the top of the slope of the fixed wedge (7) and a second station located at the bottom of the slope of the fixed wedge (7); the lower end surface of the insert (5) abuts against the upper surface of the sliding wedge (6); When the sliding wedge (6) is located at the first working position, the first supporting assembly is placed on the upper surface of the female mold (4), the upper surface of the insert (5) is flush with the upper surface of the female mold (4), and the molding mold is used for part molding; When the sliding wedge (6) is located at the second working position, the second supporting assembly is placed on the upper surface of the female mold (4), the insert (5) descends along the first through hole, the lower surface of the insert (5) is lower than the upper surface of the female mold (4), and the molding mold is used for part trimming.

2. The molding die according to claim 1, characterized in that: Limiting blocks (10) are respectively installed on the two side surfaces of the female mold (4) to limit the moving distance of the sliding wedge block (6).

3. The molding die according to claim 2, characterized in that: Handles (9) are installed at both ends of the sliding wedge block (6), and a mounting hole through which the handle (9) passes is provided on the limit block (10).

4. The molding die according to claim 2, characterized in that: The slope of the fixed wedge (7) is 6-8°.

5. The molding die according to claim 1, characterized in that: The height of the cushion block (3) in the first supporting assembly is 1 to 2 mm higher than the height of the cushion block (3) in the second supporting assembly.

6. The molding die according to claim 1, characterized in that: It also includes a push rod (8), a second through hole is provided in the middle of the sliding wedge block (6), a third through hole is provided in the middle of the fixed wedge block (7), and the push rod (8) extends into the third through hole and the second through hole in sequence from bottom to top to eject the formed parts.

7. The molding die according to claim 1, characterized in that: The part blank is provided with a positioning circular hole, and the insert (5) is provided with a positioning pin (2) and a stepped hole for installing the positioning pin (2).

8. The molding die according to claim 7, characterized in that: The part blank is a T-shaped part, the male mold (1) and the insert (5) are both T-shaped blocks with a T-shaped cross section; the first through hole is a T-shaped hole; Two arc-shaped grooves are symmetrically arranged with the center line of the stepped hole as the symmetry axis in the middle of the upper surface of the insert (5), and the cross-sectional dimension of the insert (5) is the same as that of the male mold (1).

9. A method for forming a thin plate precision pendulum-type part, characterized in that: The molding die according to any one of claims 1 to 7 comprises the following steps: Step 1: installing the male mold (1) and the lower mold assembly on the ball bearing mold frame respectively, and using a hydraulic press as a power source for the ball bearing mold frame; Step 2: Move the sliding wedge (6) to the first station, align the long side of the part blank with the long side of the first through hole, and position it through the positioning pin (2), install the part blank on the female mold (4), and place the first supporting assembly on the upper surface of the female mold (4), and place the two cushion blocks (3) in the first supporting assembly on the upper surface of the female mold (4), and the distance between the two cushion blocks (3) in the first supporting assembly after installation is greater than the length of the part blank; Step 3: Control the hydraulic press to close the molding die, move the male die (1) downward to contact the first supporting assembly, extrude the part blank, and complete the part molding process; Step 4: Control the hydraulic press to open the molding die, move the sliding wedge (6) to the second station, replace the first support assembly with the second support assembly, and place the second support assembly at the same position as the first support assembly; Step 5: Control the hydraulic press to close the molding die, and move the male die (1) downward to contact the second supporting assembly, thereby completing the trimming process of the part; Step 6: Control the hydraulic press to open the molding die and eject the part.

Images