Forming method for supporting plate nut

Abstract

The invention discloses a method for forming a supporting plate nut. The method comprises the forming process that a mold for forming the supporting plate nut is used for machining a closed hole in the supporting plate nut in a supporting plate nut blank. Due to the fact that an interval height L2 exists between a top installation gasket of an ejector rod installed in a through hole of an outer sleeve A in a penetrating mode and a die handle, a bottom head is located in a deformation hole space of an alloy die core A and extends out by the length L1, and when a rod part is extruded by the alloy die core A and an alloy die core B, extrusion materials together with a ball part are gathered into the deformation hole space to push the bottom head, and the ejector rod moves upwards; after the gaskets make contact with the die handle, the ejector rod stops moving upwards, extrusion materials extruded by the rod part and the bottom head are extruded together, the closed hole is formed, the position of the bottom head in the deformation hole space is adjusted by controlling the installation number of the gaskets, and therefore the machining forming depth of the closed hole in the supporting plate nut is controlled. The problem that the machining depth cannot be controlled due to the fact that a knockout rod slides downwards from the inside of a die shank to punch a supporting plate nut closed hole is solved.

Description

Technical Field

[0001] This invention relates to a method for forming pallet nuts, belonging to the field of pallet nut forming mold technology. Background Technology

[0002] The blank for the pallet nut is presented as a ball portion 61 and a rod portion 62, see [reference]. Figure 5 As shown. The pallet nut 6 with a central blank hole 63 needs to be machined from the pallet nut blank using stamping. See... Figure 4 As shown.

[0003] The existing technology for stamping pallet nuts is described in Chinese Patent Publication No. CN110253222A. Although the pallet nut blank can be placed into the groove of the stripper plate, and then the ejector rod slides down from the die handle to stamp out the blanking hole of the pallet nut, the processing depth of the blanking hole on the pallet nut cannot be controlled. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a method for forming a pallet nut.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for forming a pallet nut, comprising: The forming process involves using a mold to shape the pallet nut blank to create the blank hole on the pallet nut.

[0007] The forming process is as follows: the ball part of the pallet nut blank is positioned on the center positioning hole at the top of the alloy mold core B, the ejector rod is installed through the through hole of the outer sleeve A, so that the bottom head is in the deformation hole space of the alloy mold core A and extends out by a length L1, the outer sleeve A is installed in the mold handle of the press, the fastening pin is screwed into the threaded hole of the mold handle and extends into the inclined L-shaped notch on the outside of the outer sleeve A, so that the outer sleeve A with the ejector rod inside is restricted in the mold handle of the press, and a gasket is installed at the top end of the rod in the mold handle, with a gap height L2 between the gasket and the mold handle; The press presses down with outer casing A, causing alloy mold core A to move closer to alloy mold core B. The rod is squeezed by alloy mold cores A and B into a support plate. The extruded material from the rod, along with the ball, is gathered into the deformation hole space and presses against the push rod. When the gasket at the end of the push rod contacts the mold handle, the extruded material from the rod, along with the ball and the bottom head, is squeezed to form a blank. The downward displacement of the press mold handle is controlled so that the gap between alloy mold cores A and B is equal to the thickness of the support plate, and the bottom point of the blank of the support plate nut is higher than the top surface of the support plate of the support plate nut.

[0008] The pallet nut includes a pallet nut with pallets on both sides and a downward-facing hole in the middle, with the bottom of the hole located above the top surface of the pallet.

[0009] The mold for forming the pallet nut includes: It has a top rod with a bottom head at the bottom; It also includes an outer sleeve A and an alloy mold core A embedded in the lower part of the outer sleeve A. Both the outer sleeve A and the alloy mold core A are provided with through holes. The through hole part on the bottom surface of the alloy mold core A is a deformation hole space. The push rod passes through the through hole of the outer sleeve A, and the bottom head is located in the deformation hole space of the alloy mold core A and extends out.

[0010] The bottom head is designed with a double-angle shape.

[0011] The top end of the top rod has an angled and arc-shaped transition.

[0012] The outer casing A has a notch, which is an L-shaped opening that slopes down from the upper right and then folds back to the lower right.

[0013] The gaps can be two or more symmetrically distributed.

[0014] It also includes a jacket B that is located below the jacket A when in use, and an alloy mold core B is embedded and installed inside the jacket B.

[0015] The top of the alloy mold core B is provided with a recessed central positioning hole for placing and positioning the ball.

[0016] The beneficial effects of this invention are as follows: Because the top of the ejector rod, which is installed through the through hole of the outer sleeve A, has a height L2 gap between the top mounting shim and the mold shank, and the bottom head is located within the deformation hole space of the alloy mold core A and extends out by a length L1, the extruded material from the rod, when squeezed by the alloy mold core A and alloy mold core B, along with the ball, is gathered together into the deformation hole space, pushing the bottom head and causing the ejector rod to move upward. After the shim contacts the mold shank, the ejector rod stops moving upward. The extruded material squeezed by the rod, along with the ball, is squeezed against the bottom head to form a blank hole. This allows for the control of the number of shims installed to adjust the position of the bottom head within the deformation hole space, thereby controlling the processing depth of the blank hole on the pallet nut. This solves the problem of uncontrollable processing depth when the ejector rod slides downward from the mold shank to process the blank hole of the pallet nut. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of the push rod of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional distribution of the outer casing A and the alloy mold core A of the present invention; Figure 3 This is a schematic diagram of the front cross-sectional distribution of the outer casing B and the alloy mold core B of the present invention; Figure 4 This is a schematic diagram of the front cross-sectional structure of the pallet nut after it has been processed and formed according to the present invention; Figure 5This is a schematic diagram of the main cross-sectional structure of the outer casing A, alloy mold core A, and ejector rod inside the mold shank of the present invention; Figure 6 This is a schematic diagram of the main structure of the pallet nut blank before it is processed and formed; In the diagram: 1-Top rod; 11-Bottom head; 2-Alloy mold core A; 21-Deformation hole space; 3-Outer sleeve A; 31-Notch; 4-Alloy mold core B; 41-Center positioning obscured hole; 5-Outer sleeve B; 6-Support plate nut; 61-Spherical part; 62-Rod part; 63-Obscured hole; 64-Support plate; 7-Mold handle; 71-Washer; 72-Threaded hole. Detailed Implementation

[0018] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0019] like Figures 1 to 5 As shown.

[0020] This application provides a mold for forming a pallet nut, comprising: The bottom head 11 is designed as a double-angled top rod 1. When the double-angled bottom head 11 is pressed into the blank of the support plate nut blank to form the blank 63, the blank 63 can form a tapered and stepped hole, which can reduce the subsequent counterboring process. The top end of the top rod 1 is an angled and arc transition shape to avoid force concentration during the stamping process and improve the service life of the top rod.

[0021] It also includes an outer sleeve A3 and an alloy mold core A2 embedded in the lower part of the outer sleeve A3. Both the outer sleeve A3 and the alloy mold core A2 are provided with through holes. The through hole part on the bottom surface of the alloy mold core A2 is a deformation hole space 21. When the push rod 1 passes through the through hole of the outer sleeve A3, the bottom head 11 of the push rod 1 is located in the deformation hole space 21 of the alloy mold core A2. The bottom head 11 can extend out of the bottom of the deformation hole space 21 to push the support plate nut 6 downward for demolding.

[0022] The outer casing A3 has a notch 31 on its exterior. The notch 31 can be two or more symmetrically distributed. The number and position of the notches 31 are determined based on the force balance of the outer casing A3 during stamping after the fastening pins are screwed into the notches 31. The notch 31 is an L-shaped opening that slopes downwards from the upper right and then folds back to the lower right. After the fastening pins are screwed into the notches 31 through the threaded hole 72 of the die shank 7, the fastening pins restrict the vertical displacement of the outer casing A3. The fastening pins and die shank are prior art as described in Chinese Patent Publication No. CN110253222A. When used in conjunction with this prior art, the ejector rod 1 is installed through the through hole of the outer casing A3, with its bottom head 11 positioned within the deformation hole space 21 of the alloy die core A2 and extending out by a length L1. A shim 71 is installed at the top end of the ejector rod 1 inside the die shank 7, with a height L2 gap between the shim 71 and the die shank 7. L1 and L2 are adjusted by adjusting the number of shims 71 installed.

[0023] It also includes an outer jacket B5 located below the outer jacket A3 during use, and an alloy mold core B4 is embedded and installed inside the outer jacket B5; the top of the alloy mold core B4 is provided with a recessed central positioning hole 41, which is used to place and position the ball part 61.

[0024] The outer sleeve B5 and alloy mold core B4 are placed below. The support plate nut blank is placed on the alloy mold core B4. The ejector rod 1 is installed through the through hole of the outer sleeve A3. The bottom head 11 is located in the deformation hole space 21 of the alloy mold core A2 and extends out by a length L1. The outer sleeve A3 is installed into the mold handle 7 of the press. The fastening pin is screwed into the threaded hole 72 of the mold handle 7 and extends into the inclined L-shaped notch 31 on the outside of the outer sleeve A3, so that the outer sleeve A3 with the ejector rod 1 inside is installed and confined in the mold handle of the press. Because the top of the ejector rod 1 installed through the through hole of the outer sleeve A3 has a gap of height L2 between it and the mold handle 7, and the bottom head 11 is located in the deformation hole space 21 of the alloy mold core A2, the ejector rod 1 is installed in the mold handle 7. The rod 62 extends outward by a length L1. When the rod 62 is squeezed by the alloy mold cores A2 and B4, the extruded material, together with the ball 61, is gathered into the deformation hole space 21, pushing the bottom head 11 and causing the push rod 1 to move upward. After the shim 71 contacts the mold handle 7, the push rod 1 stops moving upward. The extruded material squeezed by the rod 62, together with the ball 61, is squeezed with the bottom head 11 to form a blank hole 63. This allows the number of shims 71 installed to be adjusted to adjust the position of the bottom head 11 in the deformation hole space 21, thereby controlling the processing depth of the blank hole 63 on the pallet nut 6. This solves the problem that the processing depth cannot be controlled when the punch rod slides downward from inside the mold handle to process the blank hole of the pallet nut.

[0025] During demolding, insert a sliding rod into the through hole in the middle of the mold shank 7 to push against the washer 71, so that the support plate nut 6 can be dislodged from the deformation hole space 21 of the alloy mold core A2.

[0026] This application provides a method for forming a pallet nut, comprising: Based on the use of a mold for forming pallet nuts, the ball portion 61 of the pallet nut blank is positioned on the center positioning hole 41 at the top of the alloy mold core B4. The ejector rod 1 is installed through the through hole of the outer sleeve A3, so that the bottom head 11 is in the deformation hole space 21 of the alloy mold core A2 and extends out by a length L1. The outer sleeve A3 is installed into the mold handle 7 of the press. The fastening pin is screwed into the threaded hole 72 of the mold handle 7 and extends into the inclined L-shaped notch 31 on the outside of the outer sleeve A3, so that the outer sleeve A3 with the ejector rod 1 inside is confined in the mold handle 7 of the press. The press presses down with the outer sleeve A3, and the alloy mold core... A2 moves closer to alloy mold core B4, and the rod 62 is compressed by alloy mold cores A2 and B4 to become a support plate 64. The extruded material from the rod 62, along with the ball 61, gathers into the deformation hole space 21, pressing against the ejector rod 1. When the gasket 71 at the tail of the ejector rod 1 contacts the mold handle 7, the extruded material from the rod 62, along with the ball 61, is extruded with the bottom head 11 to form a blank 63. The downward displacement of the press mold handle is controlled so that the gap between alloy mold cores A2 and B4 is equal to the thickness of the support plate 64, and the bottom point of the blank 63 of the support plate nut 6 is higher than the top surface of the support plate 64. Figure 4 As shown.

Claims

1. A method for forming a pallet nut, characterized in that, include: The forming process of machining the blank of the pallet nut (6) with the punch hole (63) is carried out using a mold for forming the pallet nut.

2. The molding method as described in claim 1, characterized in that, The forming process is as follows: the ball part (61) of the pallet nut blank is positioned on the center positioning hole (41) at the top of the alloy mold core B (4), the push rod (1) is installed through the through hole of the outer sleeve A (3), so that the bottom head (11) is in the deformation hole space (21) of the alloy mold core A (2) and extends out by a length L1, the outer sleeve A (3) is installed in the mold handle (7) of the press, the fastening pin is screwed into the threaded hole (72) of the mold handle (7) and extends into the inclined L-shaped notch (31) outside the outer sleeve A (3), so that the outer sleeve A (3) with the push rod (1) inside is restricted in the mold handle (7) of the press, and the top end of the rod (1) is installed with a gasket (71) in the mold handle (7), and the gasket (71) and the mold handle (7) have a gap height L2; The press presses down with the outer jacket A (3), and the alloy mold core A (2) moves closer to the alloy mold core B (4). The rod (62) is squeezed by the alloy mold core A (2) and the alloy mold core B (4) to become a support plate (64). The extruded material of the rod (62) when it is squeezed, together with the ball (61), gathers into the deformation hole space (21) and pushes against the push rod (1). When the gasket (71) at the tail of the push rod (1) contacts the mold handle (7), the extruded material of the rod (62), together with the ball (61) and the bottom head (11), is squeezed to form a blank hole (63). The displacement of the press mold handle is controlled so that the interval between the alloy mold core A (2) and the alloy mold core B (4) is the thickness of the support plate (64), and the bottom point of the blank hole (63) of the support plate nut (6) is higher than the top surface of the support plate (64) of the support plate nut (6).

3. The molding method as described in claim 1 or 2, characterized in that: The plate nut (6) includes a plate nut (6) with plate (64) on both sides and a downward-facing hole (63) in the middle. The bottom point of the hole (63) is above the height of the top surface of the plate (64).

4. The molding method as described in claim 1 or 2, characterized in that: The mold for forming the pallet nut includes a push rod (1) with a bottom head (11) at the bottom; It also includes an outer sleeve A (3) and an alloy mold core A (2) embedded in the lower part of the outer sleeve A (3). Both the outer sleeve A (3) and the alloy mold core A (2) are provided with through holes. The through hole part on the bottom surface of the alloy mold core A (2) is a deformation hole space (21). The top rod (1) passes through the through hole of the outer sleeve A (3), and the bottom head (11) is located in the deformation hole space (21) of the alloy mold core A (2) and extends out.

5. The molding method as described in claim 4, characterized in that: The bottom head (11) is configured with a double-angle shape.

6. The molding method as described in claim 4, characterized in that: The outer jacket A (3) has a notch (31) on the outside. The notch (31) is an L-shaped opening that slopes down from the upper right and then folds back to the lower right.

7. The molding method as described in claim 4, characterized in that: It also includes an outer jacket B (5) that is located below the outer jacket A (3) during use, and an alloy mold core B (4) is embedded and installed inside the outer jacket B (5).

8. The molding method as described in claim 7, characterized in that: The alloy mold core B (4) has a recessed central positioning hole (41) at the top for placing and positioning the ball (61).

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