Extension molding equipment
By adding extension molding equipment to the titanium alloy thick material bending molding equipment, the problem of limited moldability of titanium alloy thick material at room temperature is solved, and higher quality molding and lower processing costs are achieved.
Patent Information
- Application Number
- CN202421216282.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The moldability of titanium alloy thick materials is limited at room temperature, and conventional bending molding is prone to defects, such as arc feature depressions, defects, etc., which leads to difficulties in subsequent CNC processing, low material utilization, and increased cost.
Develop extension molding equipment to store materials by increasing the stretch thread length in the bending deformation area, ensuring that the subsequent bending sections obtain sufficient stretch thread length. The equipment includes an extension molding support seat, a lower module and an upper module. By adjusting the R angle and inclination angle parameters of the "S" shape, the curved expansion line length is controlled to achieve an appropriate stretched line length.
It effectively avoids the material shortage problem caused by excessive stretching of titanium alloy materials during bending forming, improves the molding quality, reduces subsequent processing costs, and improves material utilization.
Smart Images
Figure CN222710571U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal square frame profile processing equipment, in particular to extension and forming equipment. Background Art
[0002] As a high-end precious metal, titanium alloy is widely used in high-end mobile phone frame structural parts due to its excellent metal properties. In order to obtain a beautiful appearance structure, thick titanium alloy material (thickness T>3.0mm) is usually bent into shape, and then precisely milled by CNC (numerical control machine tool).
[0003] Since the formability of thick titanium alloy materials at room temperature is very limited, defects are very likely to occur when using conventional mold structures: concave arc features, missing materials, incompleteness, etc., which bring serious troubles to the subsequent CNC processing, often resulting in structural missing materials, and failure to ensure that the arc feature parts are milled cleanly and thoroughly, resulting in poor appearance and product scrapping. The conventional solution is to increase the thickness of the bending forming material and reduce the material utilization rate to compensate for the above arc defects. This approach not only increases material costs, but also increases CNC margins, resulting in low efficiency, increased tool loss, and increased product costs.
[0004] Therefore, stretch forming equipment is developed to solve the above problems. Utility Model Content
[0005] The utility model aims to provide an extension forming device, which increases the stretching line length in the bending deformation area and stores materials so that the subsequent bending part can obtain a sufficient stretching line length.
[0006] In order to achieve the purpose of the above utility model, the stretch forming equipment of the utility model includes a stretch forming support seat, a stretch forming lower mold and a stretch forming upper mold;
[0007] The extended molding lower mold is arranged on the extended molding support seat;
[0008] The extended molding lower mold comprises a lower pressing block and two lower molding males;
[0009] The two lower forming males are located at the two ends of the lower pressing block, and the upper surface shape of the lower forming males is adapted to the shape of the titanium alloy material after being extended and formed;
[0010] The extended forming upper die comprises an extended forming upper die seat, an upper forming male, an upper pressing block and two forming punches;
[0011] The stretch forming upper die seat is arranged at the moving end of the external vertical lifting device and is located directly above the stretch forming lower die;
[0012] A vertical lifting member is provided on the extension forming upper die seat, and a moving end of the vertical lifting member is arranged vertically downward;
[0013] The upper forming cylinder is arranged on the moving end of the vertical lifting member;
[0014] The upper forming body is an inverted "U"-shaped structure;
[0015] The shapes of the lower surfaces of the two ends of the upper forming male are adapted to the shapes of the titanium alloy material after being extended and formed;
[0016] The upper pressing block is detachably fixed to the bottom of the inner wall of the upper forming male, and the lower surface of the upper pressing block is flush with the plane parts at both ends of the upper forming male;
[0017] The two forming punches are arranged on the lower surface of the extension forming upper die seat and are located at the two ends of the upper forming male;
[0018] The inner side surfaces of the two forming punches are slidably fitted with the outer side surface of the upper forming punch;
[0019] The lower surface shape of the two forming punches is adapted to the shape of the titanium alloy material after extension forming.
[0020] Preferably, the vertical lifting members are a plurality of nitrogen springs.
[0021] Furthermore, a stop plate is provided on the top of the upper forming rod, and a plurality of channel holes are provided on the stop plate, and the channel holes correspond one by one to the moving ends of the nitrogen springs.
[0022] Preferably, upper outer limiting columns are vertically provided at both ends of the lower surface of the extension molding upper die seat;
[0023] Lower outer limiting columns are vertically provided at both ends of the upper surface of the extended and formed support seat;
[0024] The lower outer limit column corresponds to the upper outer limit column one by one;
[0025] The lower outer limiting column and the corresponding upper outer limiting column share the same axis.
[0026] Furthermore, the upper parts of the outer walls at both ends of the upper forming male are horizontally extended outward to form a limiting extension part; and an upper inner limiting column is vertically downwardly provided on the extension part.
[0027] Specifically, the upper pressing block is fixed to the bottom of the inner wall of the upper forming cylinder by means of a latch or a buckle.
[0028] Compared with the prior art, the utility model has the following advantages:
[0029] (1) According to the change of the thickness of the titanium alloy bending material, the shape of the "S" in the stretching process can be adjusted at any time. By changing the R angle and the inclination angle parameters in the "S" shape, the "S"-shaped bending expansion line length h2 is within the range of 1.2 to 1.5 times the "L" bending expansion line length h1, and the appropriate stretching line length is obtained to be absorbed by the bending forming process of the next step, so as to avoid excessive stretching of the material during the bending forming process, resulting in concave bending features and lack of material, leading to quality out of control and increased costs;
[0030] (2) Simple structure and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 This is a schematic diagram of the structure of the titanium alloy material after “S”-shaped stretching in this embodiment;
[0032] Figure 2 is a schematic structural diagram of the stretch forming equipment in this embodiment;
[0033] Figure 3 It is a schematic diagram of the working state of the stretch forming equipment in this embodiment;
[0034] Figure 4 It is a schematic diagram of the stretch forming equipment in this embodiment. DETAILED DESCRIPTION
[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.
[0036] Example
[0037] The stretch forming equipment comprises a stretch forming support seat 1, a stretch forming lower mold and a stretch forming upper mold; the stretch forming lower mold is arranged on the stretch forming support seat 1; the stretch forming lower mold comprises a lower pressure block 2 and two lower forming pins 3; the two lower forming pins 3 are located at both ends of the lower pressure block 2, and the upper surface shape of the lower forming pins 3 is adapted to the "S"-shaped stretching area (adapted to the shape of the titanium alloy material after stretch forming); the stretch forming upper mold comprises an stretch forming upper mold seat 4, an upper forming pin 5, an upper pressure block 6 and two forming punches 7; the stretch forming upper mold seat 4 is arranged at the moving end of an external vertical lifting device (not shown in the figure), and is located directly above the stretch forming lower mold; the stretch forming upper A vertical lifting member is provided on the die base 4, and the moving end of the vertical lifting member is arranged vertically downward; the upper forming pin 5 is arranged on the moving end of the vertical lifting member; the upper forming pin 5 is an inverted "U"-shaped structure; the lower surface shapes of the two ends of the upper forming pin 5 are adapted to the "S"-shaped extension area; the upper pressing block 6 is detachably fixed to the bottom of the inner wall of the upper forming pin 5, and the lower surface of the upper pressing block 6 is flush with the plane parts of the two ends of the upper forming pin 5; the two forming punches 7 are arranged on the lower surface of the extended forming upper die base 4, and are located at the two ends of the upper forming pin 5; the inner side surfaces of the two forming punches 7 are slidably fitted with the outer side surfaces of the upper forming pin 5; the lower surface shape of the two forming punches 7 is adapted to the "S"-shaped extension area.
[0038] Specifically, the detachable fixing method may be a latch fixing or a snap fixing.
[0039] like Figure 3 and Figure 4 As shown, the operation method of the titanium alloy material in the stretch forming equipment is as follows:
[0040] A1.1 Place the titanium alloy material 15 on the lower pressing block 2, with both ends of the titanium alloy material 15 extending out of the outer sides of the two lower forming males 3;
[0041] A1.2 Start the external vertical lifting device, and the entire upper extension mold moves vertically downward until the lower surfaces of both ends of the upper forming male 5 contact the upper surface of the titanium alloy material, and the vertical lifting device stops moving;
[0042] A1.2 Start the vertical lifting member, so that the upper forming block 5 and the upper pressing block 6 continue to move downward, and perform a partial "S"-shaped extension and forming process on the titanium alloy material;
[0043] A1.3 Continue to start the external vertical lifting device to make the two forming punches 7 move downward to press the titanium alloy material and complete the remaining "S"-shaped stretch forming process. Figure 1 shown.
[0044] In this embodiment, the lifting components are a plurality of nitrogen springs 8. On the one hand, the nitrogen springs have a lifting and lowering driving function, and on the other hand, they also have a certain elasticity to avoid crushing the titanium alloy material.
[0045] In this embodiment, a stop plate 9 is provided on the top of the upper molding pin 5 , and a plurality of passage holes 10 are provided on the stop plate 9 . The passage holes 10 correspond one-to-one to the moving ends of the nitrogen spring 8 for passing through, thereby further limiting the nitrogen spring 8 .
[0046] In this embodiment, upper outer limiting columns 11 are vertically provided at both ends of the lower surface of the extended forming upper die seat 4; lower outer limiting columns 12 are vertically provided at both ends of the upper surface of the extended forming support seat 1; the lower outer limiting columns 12 correspond to the upper outer limiting columns 11 one by one; the lower outer limiting columns 12 and the corresponding upper outer limiting columns 11 share the same axis. The lower limit position of the upper die seat is limited to avoid crushing the titanium alloy material.
[0047] Furthermore, the upper parts of the outer walls at both ends of the upper forming male 5 extend horizontally outward to form a limiting extension part 13; an upper inner limiting column 14 is vertically downwardly provided on the extension part 13 for the same reason as above.
[0048] In the process of bending and forming metal materials, since the length of the plane straight part remains unchanged, when the compressive stress is greater than the elastic limit (yield strength) but less than the fracture limit (tensile strength), the inner wall material of the bending part is compressed and the outer wall material is stretched, causing the curvature of the bending deformation zone to change and form a bend. For the forming of thick titanium alloy materials, a new bending forming equipment has been developed: "S"-shaped stretch forming, which is to reserve appropriate stretching line length in advance in the bending deformation zone, and deliberately form the material into an "S" shape. By controlling the R angle and inclination angle size parameters of the "S" shape, the appropriate unfolding line length is obtained. The basic parameter requirement is to make the "S"-shaped bending unfolding line length h2 be 1.2 to 1.5 times the "L"-shaped bending unfolding line length h1.
[0049] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. Extension forming equipment, characterized in that: It includes an extended forming support seat, an extended forming lower mold and an extended forming upper mold; The extended molding lower mold is arranged on the extended molding support seat; The extended molding lower mold comprises a lower pressing block and two lower molding males; The two lower forming males are located at the two ends of the lower pressing block, and the upper surface shape of the lower forming males is adapted to the shape of the titanium alloy material after being extended and formed; The extended forming upper die comprises an extended forming upper die seat, an upper forming male, an upper pressing block and two forming punches; The stretch forming upper die seat is arranged at the moving end of the external vertical lifting device and is located directly above the stretch forming lower die; A vertical lifting member is provided on the extension forming upper die seat, and a moving end of the vertical lifting member is arranged vertically downward; The upper forming cylinder is arranged on the moving end of the vertical lifting member; The upper forming body is an inverted "U" shaped structure; The shapes of the lower surfaces of the two ends of the upper forming male are adapted to the shapes of the titanium alloy material after being extended and formed; The upper pressing block is detachably fixed to the bottom of the inner wall of the upper forming male, and the lower surface of the upper pressing block is flush with the plane parts at both ends of the upper forming male; The two forming punches are arranged on the lower surface of the extension forming upper die seat and are located at the two ends of the upper forming male; The inner side surfaces of the two forming punches are slidably fitted with the outer side surface of the upper forming punch; The lower surface shape of the two forming punches is adapted to the shape of the titanium alloy material after extension forming.
2. The stretch forming equipment according to claim 1, characterized in that: The vertical lifting members are a plurality of nitrogen springs.
3. The stretch forming equipment according to claim 2, characterized in that: A stop plate is provided on the top of the upper forming male, and a plurality of channel holes are provided on the stop plate, and the channel holes correspond one by one to the moving ends of the nitrogen springs.
4. The stretch forming equipment according to any one of claims 1 to 3, characterized in that: Upper outer limiting columns are vertically provided at both ends of the lower surface of the extension forming upper die seat; Lower outer limiting columns are vertically provided at both ends of the upper surface of the extended and formed support seat; The lower outer limit column corresponds to the upper outer limit column one by one; The lower outer limiting column and the corresponding upper outer limiting column share the same axis.
5. The stretch forming equipment according to claim 4, characterized in that: The upper parts of the outer walls at both ends of the upper forming male are horizontally extended outward to form a limiting extension part; an upper inner limiting column is vertically downwardly arranged on the extension part.
6. The stretch forming equipment according to claim 1, characterized in that: The upper pressing block is fixed to the bottom of the inner wall of the upper forming cylinder by means of a latch or a buckle.