Bending die

Abstract

The utility model discloses a bending die which comprises a longitudinal mechanism and a lateral mechanism, the longitudinal mechanism comprises an upper die assembly and a lower die assembly, the lateral mechanism comprises a driving assembly and a punch assembly, the driving assembly is connected with the punch assembly in a driving mode, the punch assembly comprises a punch, a reset spring and a lower forming male with a containing groove, and the lower forming male is connected with the upper die assembly in a driving mode. The punch can be detached and replaced, and the punch with the corresponding shape can be selected according to the thickness of a material needing to be bent and the required angle after bending; the reset spring is arranged in the punch, the punch is movably arranged in the containing groove of the forming male part, material bending is carried out under the cooperation of the punch assembly and the driving assembly, metal memory which is carried in the material and keeps a horizontal state can be weakened, bending angle springback is reduced, and the effect that the bending forming angle is stable is achieved. The process of manual shaping and probe correction added on the CNC process is omitted, and the one-time yield of products is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bending equipment, in particular to a bending die. Background Art

[0002] The bending die is arranged in the press, and a suitable die is selected according to the required bending shape and installed in the press.

[0003] The current problem with bending processing is that the forming angle of most metal products is very unstable after bending, which brings serious troubles to the CNC clamping and processing in the later process, often leading to structural material shortages, lack of light, milling deviation, etc., resulting in poor appearance and many scrapped products.

[0004] The existing solutions are: 1. Manual shaping of the bent parts; 2. Adding probe calibration to the CNC process. However, although the introduction of these additional actions has significantly improved the yield, the production efficiency has been reduced and the cost has also increased significantly.

[0005] Therefore, how to solve the problem that the product forming angle made by the existing bending equipment is very unstable is a technical problem that the existing technical personnel urgently need to solve. Utility Model Content

[0006] In order to solve the problem that the forming angle of products made by existing bending equipment is very unstable, the utility model provides a bending die which can stabilize the forming angle of products, improve production efficiency and reduce production costs.

[0007] The technical solution of the utility model is:

[0008] The utility model discloses a bending die, and the first scheme comprises:

[0009] A longitudinal mechanism, the longitudinal mechanism comprising an upper die assembly and a lower die assembly, the upper die assembly and the lower die assembly being arranged opposite to each other;

[0010] The lateral mechanism includes a driving assembly and a punch assembly, the driving assembly drives and connects the punch assembly, the punch assembly is arranged on one side or both sides of the lower die assembly, the punch assembly includes a punch, a return spring and a lower forming male with a receiving groove, the punch is removable and replaceable, the return spring is arranged in the punch, and the punch is movably arranged in the receiving groove of the forming male.

[0011] Furthermore, the driving assembly includes a hitting rod, a driving block and a lifting spring, the hitting rod is fixedly connected to the upper mold assembly, and the hitting rod can move to touch the driving block, the driving block and the lifting spring are jointly arranged on one side or both sides of the lower mold assembly, and the lifting spring is connected to the driving block.

[0012] Furthermore, the driving assembly is a sensor and a transverse cylinder, the sensor is arranged on the end face of the punch assembly, the transverse cylinder is arranged on the tail of the punch assembly, and the sensor electrical signal is connected to the transverse cylinder.

[0013] Furthermore, the punch and the driving block are both provided with inclined surfaces, and the two inclined surfaces touch each other during movement, so that the punch and the driving block form an inclined wedge mechanism.

[0014] Furthermore, the upper mold assembly includes a first gap, and the lower mold assembly includes a second gap, and both the first gap and the second gap can be shortened or restored.

[0015] Further, the upper mold assembly includes an upper mold base, a first nitrogen spring, an upper pad, a stop plate, an upper mold plate, a forming pad and an upper forming male, the upper pad is located below the upper mold base, one end of the first nitrogen spring is embedded in the upper mold base and the upper pad, the other end of the first nitrogen spring is connected to the stop plate, the first gap is arranged between the upper pad and the stop plate, and one end of the hitting rod is connected to the upper pad, the hitting rod passes through the stop plate and the upper mold plate, the other end of the hitting rod is arranged opposite to the driving block, the upper mold plate is located below the stop plate, the forming pad is located below the upper mold plate, and the upper forming male is located below the forming pad.

[0016] Further, the lower die assembly includes a lower die base, a second nitrogen spring, a lower pad, a lower clamping plate, a lower template and a lower pressure plate, the lower pad is located above the lower die base, one end of the second nitrogen spring is embedded in the lower die base and the lower pad, the other end of the second nitrogen spring is connected to the lower pressure plate, the second gap is arranged between the lower pad and the lower pressure plate, and the lower forming rod is arranged on both sides of the lower pressure plate and the second gap, the lower clamping plate is arranged above the lower pad, and the lower clamping plate is located on one side of the lower forming rod, one end of the lift spring is connected to the lower clamping plate, and the other end of the lift spring is connected to the drive block, the drive block is located on one side of the punch, the lower template is located above the lower clamping plate, and the lower template is located on one side of the drive block.

[0017] Furthermore, the lower forming cylinder includes a base and a forming block, the base is arranged above the lower pad, the forming block is arranged in the base, and the accommodating groove is arranged in the base and the forming block.

[0018] The second solution: The difference from the first solution is that the driving assembly is a sensor and a transverse cylinder, the sensor is arranged on the end face of the punch assembly, the transverse cylinder is arranged on the tail of the punch assembly, and the sensor electrical signal is connected to the transverse cylinder.

[0019] The beneficial effects of the utility model are:

[0020] The punch assembly is designed to include a punch, a return spring and a lower forming male with a receiving groove. The punch is detachable and replaceable, and a punch of corresponding shape can be selected according to the thickness of the material to be bent and the required angle after bending; the return spring is arranged in the punch, and the punch can be movably arranged in the receiving groove of the forming male. The return spring allows the punch to maintain a fixed displacement during the extrusion of the material, thereby maintaining the shape stability of the material and avoiding distortion or deformation; it can also reduce external interference with the extrusion process and reduce energy consumption; when the driving force of the punch disappears, the return spring allows the punch to The punch assembly is connected to the driving assembly, and the driving assembly assists in forming the bending angle. The material is bent under the cooperation of the punch assembly and the driving assembly, which can weaken the metal memory carried inside the material to maintain a horizontal state, reduce the rebound of the bending angle, achieve the effect of stabilizing the bending forming angle, and make the bending forming angle stable in the required specified area, eliminating the need for manual shaping and adding probe correction processes to the CNC process, greatly improving the one-time yield of the product, and greatly helping to improve production efficiency and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the mold opening state of Example 1 of the utility model;

[0022] Figure 2 for Figure 1 A partially enlarged structural schematic diagram of the lateral mechanism;

[0023] Figure 3 This is a schematic structural diagram of the closed mold state of Example 1 of the utility model;

[0024] Figure 4 for Figure 3 A partially enlarged structural schematic diagram of the lateral mechanism;

[0025] Figure 5 This is a schematic diagram of the structure of the mold opening state of Example 2 of the utility model;

[0026] Figure numerals: 1. longitudinal mechanism, 11. upper die assembly, 111. upper die seat, 112. first nitrogen spring, 113. upper pad, 114. stop plate, 115. upper template, 116. forming pad, 117. upper forming male, 12. lower die assembly, 121. lower die seat, 122. second nitrogen spring, 123. lower pad, 124. lower clamp, 125. lower template, 126. lower pressing plate, 2. lateral mechanism, 21. drive assembly, 211. hitting rod, 212. drive block, 213. lifting spring, 214. sensor, 215. transverse cylinder, 22. punch assembly, 221. punch, 222. return spring, 223. lower forming male, 2231. base, 2232. forming block, 224. accommodating groove, 23. inclined surface, 3. first gap, 4. second gap. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Example 1

[0029] Taking the preparation of high-end mobile phone frame structural components as an example, the two ends of the straight titanium alloy material are bent to form two rounded corners.

[0030] Reference Figure 1-Figure 4 The utility model provides a bending die, comprising:

[0031] A longitudinal mechanism 1, wherein the longitudinal mechanism 1 comprises an upper die assembly 11 and a lower die assembly 12, wherein the upper die assembly 11 and the lower die assembly 12 are arranged opposite to each other, and a material is placed between the upper die assembly 11 and the lower die assembly 12, and the upper die assembly 11 and the lower die assembly 12 apply longitudinal pressure to the material, clamp the material, and keep the material stable between the upper die assembly 11 and the lower die assembly 12;

[0032] The lateral mechanism 2 includes a driving assembly 21 and a punch assembly 22. The driving assembly 21 drives and connects the punch assembly 22. The punch assembly 22 is arranged on both sides of the lower die assembly 12. The punch assembly 22 includes a punch 221, a return spring 222 and a lower forming male 223 with a receiving groove 224. The punch 221 is detachable and replaceable. The return spring 222 is arranged in the punch 221. The punch 221 can be movably arranged in the receiving groove 224 of the forming male. Therefore, the punch 221 can be matched and replaced according to the required bending shape and material thickness on the one hand. On the other hand, since the punch 221 has a return spring 222 and is arranged in the receiving groove 224, the driving assembly 2 The punch 221 can be driven to move in the receiving groove 224. When the driving force disappears, the reset spring 222 resets the punch 221. As the longitudinal pressure on the material increases, the upper die assembly 11 and the lower die assembly 12 are displaced, driving the material to fall into the lateral mechanism 2. Driven by the driving assembly 21, the punch assembly 22 extrude the material in the horizontal direction, so that the material on both sides of the upper die assembly 11 and the lower die assembly 12 is extruded to form an arc profile. Due to the presence of the reset spring 222, the punch 221 maintains a fixed displacement during the extrusion of the material, thereby maintaining the shape stability of the material and avoiding distortion or deformation. It can also reduce external interference in the extrusion process and reduce energy consumption.

[0033] It is further explained how the driving assembly 21 drives the punch 221. The driving assembly 21 includes a rod 211, a driving block 212 and a floating spring 213. The rod 211 is fixedly connected to the upper die assembly 11, and the rod 211 can move to touch the driving block 212. The driving block 212 and the floating spring 213 are jointly arranged on both sides of the lower die assembly 12. The floating spring 213 is connected to the driving block 212. As the upper die assembly 11 is displaced, the rod 211 is driven to move. When the rod 211 touches the driving block 212, the driving block 2 The floating spring 213 in 12 is squeezed and contracted, so that the driving block 212 also produces a fixed displacement. The driving block 212 contacts the punch 221, and the driving block 212 generates a horizontal force on the punch 221. When the hitting rod 211 leaves the driving block 212, the floating spring 213 recovers and resets the driving block 212. The driving block 212 cannot contact the punch 221. Therefore, the driving block 212 does not need to have its own electric power to drive the punch 221. The movement of the upper mold assembly 11 simultaneously drives the lateral mechanism 2, so that the extrusion process can be synchronized, and no additional algorithm is required to improve the accuracy of the extrusion action of the lateral mechanism 2.

[0034] It is worth noting that both the punch 221 and the driving block 212 are provided with inclined surfaces 23, and the two inclined surfaces 23 touch each other during movement, and the punch 221 and the driving block 212 form an inclined wedge mechanism. Using the principle of mechanical transmission, the punch 221 is equivalent to a slider, and the driving block 212 is equivalent to an inclined wedge. The cooperation between the punch 221 and the driving block 212 converts vertical motion into horizontal motion, converts longitudinal force into lateral force, and completes the extrusion action.

[0035] Furthermore, the upper mold assembly 11 includes a first gap 3, and the lower mold assembly 12 includes a second gap 4. The first gap 3 and the second gap 4 can both be shortened or restored. When bending, the first gap 3 and the second gap 4 will shrink as the pressure increases, and until the first gap 3 and the second gap 4 return to zero, so that the upper mold assembly 11 and the lower mold assembly 12 are tightly clamped to adjust the size of the first gap 3 and the second gap 4, so as to control the size of the force acting on the material.

[0036] Furthermore, the upper mold assembly 11 includes an upper mold base 111, a first nitrogen spring 112, an upper pad 113, a stop plate 114, an upper mold plate 115, a forming pad 116 and an upper forming male 117, wherein the upper pad 113 is located below the upper mold base 111, one end of the first nitrogen spring 112 is embedded in the upper mold base 111 and the upper pad 113, and the other end of the first nitrogen spring 112 is connected to the stop plate 114, and the first gap 3 is set Between the upper pad 113 and the stop plate 114, and one end of the hitting rod 211 is connected to the upper pad 113, the hitting rod 211 passes through the stop plate 114 and the upper template 115, and the other end of the hitting rod 211 is arranged opposite to the driving block 212, the upper template 115 is located below the stop plate 114, the forming pad 116 is located below the upper template 115, and the upper forming male 117 is located below the forming pad 116.

[0037] Furthermore, the lower mold assembly 12 includes a lower mold base 121, a second nitrogen spring 122, a lower pad 123, a lower clamping plate 124, a lower mold plate 125 and a lower pressing plate 126, the lower pad 123 is located above the lower mold base 121, one end of the second nitrogen spring 122 is embedded in the lower mold base 121 and the lower pad 123, the other end of the second nitrogen spring 122 is connected to the lower pressing plate 126, the second gap 4 is set between the lower pad 123 and the lower pressing plate 126, and the lower molding groove 4 is provided. 223 is arranged on both sides of the lower pressing plate 126 and the second gap 4, the lower clamping plate 124 is arranged above the lower pad 123, and the lower clamping plate 124 is located on one side of the lower forming male 223, one end of the floating spring 213 is connected to the lower clamping plate 124, and the other end of the floating spring 213 is connected to the driving block 212, and the driving block 212 is located on one side of the punch 221, and the lower template 125 is located above the lower clamping plate 124, and the lower template 125 is located on one side of the driving block 212.

[0038] Specifically, the upper die assembly 11 and the lower die assembly 12 are both installed in the press, and the upper die base 111 and the lower die base 121 are used to fix the entire upper die assembly 11 and the lower die assembly 12; the upper pad 113 and the lower pad 123 are used to support and protect the material; the stop plate 114 limits the movement range of the material to ensure that it maintains the correct position during the processing; the upper template 115 and the lower template 125 are used to form a connection position; the forming pad 116 is used to distribute pressure to avoid material damage due to excessive stress when bending the material; the upper forming pin 117 and the lower forming pin 223 are used to assist in positioning and supporting the workpiece, providing stable support during the bending process; the lower clamp 124 is used to form the installation position of the floating spring 213, fixing the drive block 212 thereon; the lower pressure plate 126 is used to directly contact the material; the structural design of the upper die assembly 11 and the lower die assembly 12 ensures that the material can be fully supported and fixed during the bending process, and the pressure is evenly distributed, thereby achieving precise bending shape and high-quality forming. Figure 1 The material is located between the upper forming male 117 and the lower pressing plate 126. The length of the upper forming male 117 is greater than the length of the lower pressing plate 126, which facilitates the material to bend upward and round the corners.

[0039] The lower molding male 223 includes a base 2231 and a molding block 2232. The base 2231 is arranged above the lower pad 123, and the molding block 2232 is arranged in the base 2231. The accommodating groove 224 is arranged in the base 2231 and the molding block 2232. The molding block 2232 is also detachable and replaceable. Whether to install the molding block 2232 is selected according to the thickness of the material.

[0040] The first nitrogen spring 112 and the second nitrogen spring 122 generate elastic force by compression and expansion of nitrogen in a closed pressure cylinder, and the magnitude of the elastic force can be accurately controlled by adjusting the pressure of the nitrogen, thereby adjusting the size of the first gap 3 and the second gap 4.

[0041] Specifically, the punch 221 has a two-section structure, one end of the return spring 222 is fixedly connected to the first section structure of the punch 221, and the other end of the return spring 222 is fixedly connected to the second section structure of the punch 221. There is a gap between the first section structure and the second section structure of the punch 221, so that the punch 221 has elastic restoring force and maintains a fixed displacement during the extrusion of the material.

[0042] Both the driving block 212 and the lower clamping plate 124 are provided with installation positions for the floating spring 213, and there is a gap between the driving block 212 and the lower clamping plate 124, so that the driving block 212 can touch the inclined surface 23 of the punch 221 when the floating spring 213 is squeezed and deformed. When the floating spring 213 recovers, the inclined surface 23 of the driving block 212 does not contact the inclined surface 23 of the punch 221.

[0043] Example 2

[0044] Reference Figure 5 , which is different from Example 1, is that the driving assembly 21 is composed of a sensor 214 and a transverse cylinder 215, the sensor 214 is arranged on the end face of the punch assembly 22, the transverse cylinder 215 is arranged on the tail of the punch assembly 22, and the sensor 214 is electrically connected to the transverse cylinder 215.

[0045] Specifically, the transverse cylinder 215 can be arranged on the lower template 125 to ensure that the transverse cylinder 215 can touch the punch 221 when it is extended and retracted; during the rounded corner extrusion process, the sensor 214 senses that the light is completely blocked, and the sensor 214 sends a signal to the transverse cylinder 215. Under the action of electricity, the transverse cylinder 215 drives the punch 221 to further extrude the material.

[0046] Example 3

[0047] The difference from the first embodiment is that the lateral mechanism 2 is only provided on one side of the lower pressing plate 126, and only the rounded corners on one side are formed.

[0048] The utility model discloses a bending method, which comprises the following steps:

[0049] Step S1, placing the material to be molded between the upper mold assembly 11 and the lower mold assembly 12;

[0050] Step S2, driving the first nitrogen spring 112 and the second nitrogen spring 122 at the same time, the second gap 4 is first returned to zero, the first gap 3 is also gradually reduced, the material to be formed falls between the lower forming male 223 and the lower pressing plate 126, the driving block 212 is subjected to the vertical downward force of the hitting rod 211, the floating spring 213 is deformed, the driving block 212 moves vertically downward, the inclined surface 23 of the driving block 212 touches the inclined surface 23 of the punch 221, the driving block 212 pushes the punch 221 to move along the accommodating groove 224 toward the lower pressing plate 126, and the material to be formed is bent;

[0051] Step S3, restore the first nitrogen spring 112 and the second nitrogen spring 122, restore the first gap 3 and the second gap 4 to their original distances, and reset the hitting rod 211 and the punch 221 to complete the bending of the molding material.

[0052] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. Bending die, characterized in that: include: A longitudinal mechanism (1), the longitudinal mechanism (1) comprising an upper die assembly (11) and a lower die assembly (12), the upper die assembly (11) and the lower die assembly (12) being arranged relative to each other; A lateral mechanism (2), the lateral mechanism (2) comprising a driving assembly (21) and a punch assembly (22), the driving assembly (21) drivingly connected to the punch assembly (22), the punch assembly (22) being arranged on one side or both sides of the lower die assembly (12), the punch assembly (22) comprising a punch (221), a return spring (222) and a lower forming male (223) with a receiving groove (224), the punch (221) being detachable and replaceable, the return spring (222) being arranged in the punch (221), and the punch (221) being movably arranged in the receiving groove (224) of the forming male.

2. The bending die according to claim 1, characterized in that: The driving assembly (21) comprises a driving rod (211), a driving block (212) and a floating spring (213); the driving rod (211) is fixedly connected to the upper mold assembly (11), and the driving rod (211) can move to touch the driving block (212); the driving block (212) and the floating spring (213) are jointly arranged on one side or both sides of the lower mold assembly (12); and the floating spring (213) is connected to the driving block (212).

3. The bending die according to claim 1, characterized in that: The driving assembly (21) comprises a sensor (214) and a transverse cylinder (215); the sensor (214) is arranged on the end surface of the punch assembly (22); the transverse cylinder (215) is arranged on the tail of the punch assembly (22); and the sensor (214) is electrically connected to the transverse cylinder (215).

4. The bending die according to claim 2, characterized in that: The punch (221) and the driving block (212) are both provided with inclined surfaces (23), and the two inclined surfaces (23) touch each other as they move.

5. The bending die according to claim 4, characterized in that: The upper mold assembly (11) comprises a first gap (3), and the lower mold assembly (12) comprises a second gap (4), and both the first gap (3) and the second gap (4) can be shortened or restored.

6. The bending die according to claim 5, characterized in that: The upper mold assembly (11) comprises an upper mold base (111), a first nitrogen spring (112), an upper pad (113), a stop plate (114), an upper mold plate (115), a forming pad (116) and an upper forming pin (117); the upper pad (113) is located below the upper mold base (111); one end of the first nitrogen spring (112) is embedded in the upper mold base (111) and the upper pad (113); the other end of the first nitrogen spring (112) is connected to the stop plate (114); the first gap (3) is provided at the The upper pad (113) and the stop plate (114) are interposed between the upper pad (113) and the stop plate (114), and one end of the hitting rod (211) is connected to the upper pad (113), the hitting rod (211) passes through the stop plate (114) and the upper template (115), and the other end of the hitting rod (211) is arranged opposite to the driving block (212), the upper template (115) is located below the stop plate (114), the forming pad (116) is located below the upper template (115), and the upper forming rod (117) is located below the forming pad (116).

7. The bending die according to claim 5, characterized in that: The lower die assembly (12) comprises a lower die base (121), a second nitrogen spring (122), a lower pad (123), a lower clamp (124), a lower mold plate (125) and a lower pressing plate (126), wherein the lower pad (123) is located above the lower die base (121), one end of the second nitrogen spring (122) is embedded in the lower die base (121) and the lower pad (123), the other end of the second nitrogen spring (122) is connected to the lower pressing plate (126), the second gap (4) is provided between the lower pad (123) and the lower pressing plate (126), and the lower molding groove (2 23) are arranged on both sides of the lower pressure plate (126) and the second gap (4), the lower clamping plate (124) is arranged above the lower pad (123), and the lower clamping plate (124) is located on one side of the lower forming pin (223), one end of the floating spring (213) is connected to the lower clamping plate (124), and the other end of the floating spring (213) is connected to the driving block (212), and the driving block (212) is located on one side of the punch (221), and the lower template (125) is located above the lower clamping plate (124), and the lower template (125) is located on one side of the driving block (212).

8. The bending die according to claim 7, characterized in that: The lower molding rod (223) comprises a base (2231) and a molding block (2232); the base (2231) is arranged above the lower pad (123); the molding block (2232) is arranged in the base (2231); and the receiving groove (224) is arranged in the base (2231) and the molding block (2232).

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