Linear inclined mechanism, punch and shaping method

Abstract

The application discloses a linear oblique upward mechanism, a stamping die and a shaping method, and belongs to the technical field of molds. The linear oblique upward mechanism comprises a first cylinder driving base moving block, a second cylinder driving sliding block assembly and a base moving block and a cylinder stopper in a working position. The first cylinder driving base moving block and the second cylinder driving sliding block assembly are connected through a split type linear driving structure. The base moving block and the cylinder stopper are in abutment in the working position to realize mechanical limiting cooperation. The linear oblique upward mechanism can directly and accurately control the linear stroke and locking of the sliding block assembly through the cylinder during work, effectively avoids the rebound and swing error of a traditional rotary oblique wedge due to rotary motion, and significantly improves the shaping precision of negative angle parts. Meanwhile, the base moving block controlled by the side cylinder is used as a rigid stopper to replace the traditional friction type or rotary type back-off limitation depending on a nitrogen cylinder, the back-off reliability and stability of the sliding block in the working state are greatly enhanced, and it is ensured that the long-stroke negative angle part can be smoothly and safely demolded and taken out after machining.

Description

Technical Field

[0001] This invention relates to the field of mold technology, specifically to a linear upward-sloping mechanism, a stamping die, and a shaping method. Background Technology

[0002] A wedge mechanism is a mechanical mechanism that converts vertical motion into horizontal or tilting motion, and it is widely used in the mold industry. A traditional rotating wedge shapes parts along the drive assembly between the slider assembly and the rotating assembly.

[0003] like Figure 1 As shown, a traditional rotary wedge mechanism generally consists of four main parts: a drive assembly, a slider assembly, a rotating assembly, and a base assembly. The mounting surface of the rotary wedge is located in front of the slider assembly, and the slider assembly shapes the part from the front of the rotating assembly along the guide surface of the drive assembly.

[0004] However, when the part structure is limited and the forming length is too long, there is no space in the mold to install the rotating component and the base component, making the traditional rotating wedge unusable. In addition, the traditional rotating wedge has the following shortcomings during operation: First, the rotation method changes the direction of motion, resulting in a complex structure and large space occupation; second, the return is reliably unreliable due to compression by a nitrogen cylinder; third, it requires a press to drive the rotating shaft, resulting in a long transmission chain and difficulty in precision control.

[0005] To address the aforementioned issues, some improved solutions have emerged in the existing technology. For example, some solutions use a cylinder to drive the wedge mechanism, achieving the function through the rotation of the rotating part around the rotation axis; others use a V-shaped guide plate in conjunction with a forced return mechanism to achieve the reciprocating motion of the wedge slider. However, these solutions still suffer from problems such as limited working stroke and insufficient return reliability in the application scenario of negative angle part shaping. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a linear inclined upward mechanism, a stamping die, and a forming method, which solves the technical problems of insufficient space, limited working stroke, and poor retraction reliability of existing rotary wedge mechanisms when forming negative angle parts.

[0007] To achieve the above objectives, the present invention provides the following solution: A linear inclined upward mechanism includes a base assembly and a slider assembly. The base assembly is used to be fixedly connected to a stamping die. The bottom of the slider assembly is slidably disposed above the base assembly. The front end of the slider assembly is used to install a shaping insert to shape the part. The base assembly includes a first cylinder, a second cylinder, a cylinder connecting rod, and a base moving block. The second cylinder is installed at the rear end of the base assembly and is used to drive the slider assembly to reciprocate in a straight line. The first cylinder is installed on the side of the base assembly and is connected to the base moving block through the cylinder connecting rod, and is used to drive the base moving block to switch between the working position and the retracting position. The slider assembly is provided with a cylinder stop. When the base moving block is in the working position, the base moving block abuts against the cylinder stop to restrict the slider assembly from retracting.

[0008] Preferably, the base assembly further includes a convex guide plate, and the slider assembly further includes a V-shaped guide plate. The V-shaped guide plate is installed at the lower end of the slider assembly, and the convex guide plate is installed on the inner cavity of the base assembly. The V-shaped guide plate and the convex guide plate slide together to form a V-shaped sliding guide structure.

[0009] Preferably, the sliding friction pair between the V-shaped guide plate and the convex guide plate adopts a copper-to-steel friction fit.

[0010] Preferably, there are two first cylinders, which are respectively installed on both sides of the base assembly.

[0011] Preferably, the base assembly further includes a pneumatic switch and a pneumatic valve. The pneumatic valve is used to control the air passage opening and closing and reversal of the first cylinder and the second cylinder. The pneumatic switch is used to detect the position of the slider assembly and control the action sequence of the first cylinder.

[0012] Preferably, the base assembly further includes a guide plate, which is installed in the rear end cavity of the base assembly to provide sliding guidance for the slider assembly.

[0013] Preferably, the base assembly further includes a pressure plate and a positioning key. The pressure plate is installed on both end faces of the base assembly, and the positioning key is installed on the bottom surface of the base assembly for positioning and installation between the base assembly and the stamping die.

[0014] Preferably, the slider assembly further includes a slider connecting block and a cylinder fixing plate. The slider connecting block and the cylinder fixing plate are both installed at the rear end of the slider assembly. The slider connecting block is used to connect with the piston rod of the second cylinder, and the cylinder fixing plate is used to fix the second cylinder.

[0015] A stamping die includes a linear upward-sloping mechanism.

[0016] A method for shaping negative angle parts using a linear oblique upward mechanism, characterized by comprising the following steps: Drive the second cylinder to move the slider assembly in a straight line to the working position; Drive the first cylinder to move the base moving block to the working position. The base moving block abuts against the cylinder stop block to restrict the slide block from retracting and to perform negative angle part shaping. After the shaping is completed, the first cylinder is driven to move the base moving block to the retracted position, thereby releasing the restriction on the slider assembly; The second cylinder is driven to retract the slider assembly to its initial position, avoiding the negative angle component.

[0017] The present invention achieves the following technical effects compared to the prior art: This invention utilizes a separate linear drive structure that limits the first cylinder to drive the base moving block and the second cylinder to drive the slider assembly, and a mechanical limiting relationship between the base moving block and the cylinder stop block in the working position. This allows the upward-sloping mechanism to directly and precisely control the linear stroke and locking of the slider assembly via the cylinder during operation, effectively avoiding the springback and swaying errors caused by the rotational motion of traditional rotating wedges, and significantly improving the shaping accuracy of negative angle parts. At the same time, the use of the base moving block, independently controlled by the side cylinder, as a rigid stop block replaces the traditional friction or rotational back-retraction restriction relying on nitrogen cylinders, greatly enhancing the anti-back-retraction reliability and stability of the slider in the working state. This ensures that long-stroke negative angle parts can be smoothly and safely demolded after processing, and the overall structure is simplified, reducing the space occupied inside the mold and the manufacturing cost. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram illustrating the usage state of the present invention; Figure 3 This is an exploded view of the present invention; The components include: 1. Base assembly; 2. Slider assembly; 3. Negative angle component; 4. Shaping insert; 101. Convex guide plate; 102. Pneumatic switch; 103. Pressure plate; 104. Pneumatic valve; 105. Positioning key; 106. First cylinder; 107. Second cylinder; 108. Guide plate; 109. Cylinder connecting rod; 110. Base moving block; 201. V-shaped guide plate; 202. Cylinder stop block; 203. Slider connecting block; 204. Cylinder fixing plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a linear inclined upward mechanism, a stamping die, and a forming method, which solves the technical problems of insufficient space, limited working stroke, and poor retraction reliability of existing rotary wedge mechanisms when forming negative angle parts.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] refer to Figures 1 to 3A linear inclined upward mechanism includes a base assembly 1 and a slider assembly 2. The base assembly 1 is fixedly connected to a stamping die. The bottom of the slider assembly 2 is slidably disposed above the base assembly 1. The front end of the slider assembly 2 is used to install a shaping insert 4 to shape the part. The base assembly 1 includes a first cylinder 106, a second cylinder 107, a cylinder connecting rod 109, and a base moving block 110. The second cylinder 107 is installed at the rear end of the base assembly 1 and is used to drive the slider assembly 2 to reciprocate in a linear direction. The first cylinder 106 is installed on the side of the base assembly 1 and is connected to the base assembly 1 via the cylinder connecting rod 109. The second cylinder 107, which drives the sliding block 110, is connected to the base moving block 110 and is used to drive the base moving block 110 to switch between the working position and the retracted position. The slider assembly 2 is provided with a cylinder stop 202. When the base moving block 110 is in the working position, the base moving block 110 abuts against the cylinder stop 202 to restrict the retraction of the slider assembly 2. This invention separates the second cylinder 107, which drives the slider assembly 2, from the first cylinder 106, which drives the limiting component to switch, thus constructing a dual-cylinder collaborative working system with separate driving and locking mechanisms. This enables linear stroke control of the slider assembly 2 and anti-retraction locking control after it reaches the desired position. The components are independent and do not interfere with each other. This ensures that the slider assembly 2 can obtain a sufficiently large linear working stroke to meet the shaping requirements of the long negative angle part 3. At the same time, a rigid mechanical hard limit is achieved through an independent side cylinder driven movable limit component. Compared with the traditional rotating wedge relying on nitrogen cylinder friction resistance or complex rotation locking structure, this significantly improves the stability of the slider in the working position and the reliability of anti-backwardness, effectively avoiding poor part forming or mold damage caused by accidental slider backwardness. At the same time, the slider assembly 2 and the base assembly 1 adopt a V-shaped sliding guide structure with a copper-to-steel friction pair. It combines the advantages of automatic centering guidance, high load-bearing capacity and low friction and wear resistance, further ensuring the stability and service life of the slider assembly 2 in long-term high-precision linear motion. The timing control system of pneumatic control valve and position detection switch ensures the safe action logic of "limit component locking first, slider assembly 2 then retracting", so that the entire work cycle is completed automatically, orderly and reliably. Finally, it realizes high-precision, long-stroke and high-reliability shaping and processing of negative angle part 3, and ensures smooth demolding and removal of the processed part. The overall structure is simple, occupies little space and has controllable cost.

[0024] refer to Figure 3The base assembly 1 also includes a convex guide plate 101, and the slider assembly 2 also includes a V-shaped guide plate 201. The V-shaped guide plate 201 is installed at the lower end of the slider assembly 2, and the convex guide plate 101 is installed on the inner cavity of the base assembly 1. The V-shaped guide plate 201 and the convex guide plate 101 slide together to form a V-shaped sliding guide structure. During the linear reciprocating motion of the slider assembly 2 relative to the base assembly 1, the single sliding pair simultaneously constrains and guides the motion degree of freedom of the slider assembly 2 in two orthogonal directions (i.e., the horizontal and vertical directions perpendicular to the sliding direction). This ensures that the slider assembly 2 can maintain a precise and stable linear motion trajectory without deviation or swaying when subjected to complex alternating working loads (especially the lateral reaction force from the shaping of the negative angle part 3), thereby ensuring the positional accuracy and dimensional consistency of the shaping process of the negative angle part 3.

[0025] refer to Figure 3 The sliding friction pair between the V-shaped guide plate 201 and the convex guide plate 101 adopts a copper-to-steel friction fit. Under the high pressure and strong contact conditions of the V-shaped inclined surface caused by large lateral working loads, a sliding friction pair with low friction coefficient, high wear resistance, excellent anti-galling performance and economical maintenance is constructed by selecting dissimilar metal materials with different physical properties and tribological characteristics. This ensures the long-term high precision and high stability of the V-shaped sliding guide structure while reducing friction energy consumption, reducing heat generation and temperature rise, extending the service life of parts, and realizing independent replacement and economical maintenance of vulnerable parts.

[0026] refer to Figure 3 There are two first cylinders 106, which are installed on both sides of the base assembly 1 respectively. By symmetrically arranging the two cylinders, the movable limiting component (i.e., the base moving block 110) set inside the base assembly 1 is subjected to synchronous, equal and same driving force on both sides. This ensures that the movable limiting component is always subjected to balanced force and moves smoothly during the process of switching from the unlocked position to the locked position (or the reverse switching). This avoids the movable limiting component from tilting, jamming or moving asynchronously due to the off-center torque generated by the unilateral drive. It ensures that the movable limiting component can reliably move to the working position and form a stable and rigid abutment with the cylinder stop 202 on the slider assembly 2, thereby realizing the reliable locking of the slider assembly 2 in the working position.

[0027] refer to Figure 3The base assembly 1 also includes a pneumatic switch 102 and a pneumatic valve 104. The pneumatic valve 104 is used to control the air supply direction and air flow switching of the first cylinder 106 and the second cylinder 107. The pneumatic switch 102 is used to detect the position of the slider assembly 2 and control the action sequence of the first cylinder 106. The core purpose is to centrally control the air supply direction and air flow of the first cylinder 106 and the second cylinder 107 through the pneumatic valve 104, and to use the pneumatic switch 102 to detect in real time whether the slider assembly 2 has reached the working position, and to automatically adjust the operation according to the preset logic. The timing of the first cylinder 106 is controlled to ensure that the safe action sequence of "slider assembly 2 moves into position first and then locks" and "movable limit component unlocks first and then slide assembly 2 retracts" is strictly executed. This avoids the slide assembly 2 locking before it reaches the position (causing jamming or damage) or the slide assembly 2 forcibly retracting under load (causing part scrap or mold damage) due to misoperation or timing disorder. This achieves automated, programmed, and safe operation of the entire work cycle, improving the consistency of production cycle and operational safety.

[0028] refer to Figure 3 The base assembly 1 also includes a guide plate 108, which is installed in the rear end cavity of the base assembly 1 to provide sliding guidance for the slider assembly 2. The purpose is to add an auxiliary support and guide point between the rear end of the slider assembly 2 and the rear end cavity of the base assembly 1. Together with the V-shaped sliding guide structure set in the front or middle of the slider assembly 2, it forms a stable guide system of "front and rear double point support". It is specifically designed to constrain and support the rear of the slider assembly 2, preventing it from "heading down" or "tailing up" due to excessive working stroke or excessive overhang of the slider assembly 2 under the action of gravity or eccentric load. It ensures that the slider assembly 2 always maintains the correct horizontal posture and straight trajectory during the entire reciprocating motion, avoiding misalignment of front and rear movements, increased wear of the V-shaped guide pair due to eccentric load, and decreased positional accuracy of the shaping insert 4 due to insufficient single-point guidance. This ensures the dimensional accuracy and surface quality of the long-stroke negative angle part 3 during shaping and processing, while extending the service life of the V-shaped guide structure.

[0029] refer to Figure 3The base assembly 1 also includes a pressure plate 103 and a positioning key 105. The pressure plate 103 is installed on both end faces of the base assembly 1, and the positioning key 105 is installed on the bottom surface of the base assembly 1. It is used for positioning and installation between the base assembly 1 and the stamping die. The positioning key 105 cooperates with the keyway on the stamping die to achieve fast, accurate, and consistent positioning of the base assembly 1 on the die. This ensures that the spatial position of the base assembly 1 coincides with the design position each time it is installed. It also ensures that the movement direction, working stroke, and working position of the shaping insert 4 of the slider assembly 2 are accurately aligned with the area to be shaped of the part, avoiding poor shaping accuracy due to installation position deviation. At the same time, the pressure plate 103 presses and fixes both end faces of the base assembly 1 onto the die, providing sufficient clamping force to resist the huge lateral force, vibration, and impact generated during the operation of the upward-sloping mechanism. This prevents the base assembly 1 from shifting, loosening, or falling off the die, achieving the installation function of "accurate positioning, reliable fixing, and convenient assembly and disassembly". This ensures the positional stability and safety reliability of the mechanism under long-term high-frequency stamping working conditions.

[0030] refer to Figure 3 The slider assembly 2 also includes a slider connecting block 203 and a cylinder fixing plate 204. Both the slider connecting block 203 and the cylinder fixing plate 204 are installed at the rear end of the slider assembly 2. The slider connecting block 203 is used to connect with the piston rod of the second cylinder 107, and the cylinder fixing plate 204 is used to fix the second cylinder 107. By integrating a power input interface (slider connecting block 203) and a drive source mounting interface (cylinder fixing plate 204) at the rear end of the slider assembly 2, the cylinder body of the second cylinder 107 is fixed to the slider assembly 2, and the piston rod is connected to the slider assembly 2 via the slider connecting block 203, thus forming an integrated linkage unit between the second cylinder 107 and the slider assembly 2. When the piston rod of cylinder 107 extends or retracts, it directly drives the slider assembly 2 to slide relative to the base assembly 1, eliminating the need for intermediate transmission links. This achieves a compact power transmission method of "cylinder following and direct drive," thereby simplifying the transmission chain, reducing transmission gaps and accumulated errors, and improving power transmission efficiency and response speed. At the same time, fixing the second cylinder 107 to the rear end of the slider assembly 2 instead of the base assembly 1 allows the second cylinder 107 to move together with the slider assembly 2 without occupying additional axial installation space of the base assembly 1. This effectively shortens the overall length of the mechanism, which is beneficial for achieving large-stroke linear motion within the limited space of the mold and facilitates the selection, installation, debugging, and maintenance of the second cylinder 107.

[0031] Furthermore, a stamping die includes a linear upward-sloping mechanism; specifically, it includes an upper die assembly, a lower die assembly, and a forming working area disposed between the upper die assembly and the lower die assembly. The linear upward-sloping mechanism described in any of the foregoing technical solutions is mounted on the lower die assembly. The linear upward-sloping mechanism is fixedly mounted on the mounting plane of the lower die assembly via its base assembly 1, and performs shaping processing on the negative angle part 3 located in the forming working area via the shaping insert 4 at the front end of its slider assembly 2.

[0032] A method for shaping a negative angle part 3 using a linear upward oblique mechanism includes the following steps: Step 1: Slider forward movement Compressed air is introduced into the air inlet of the second cylinder 107, causing the piston rod of the second cylinder 107 to extend. The slider assembly 2 is driven to move in a straight line relative to the base assembly 1 through the slider connecting block 203, so that the shaping insert 4 installed at the front end of the slider assembly 2 moves from the initial position to the working position, and contacts or enters the working distance range that can be shaped, the negative angle area of ​​the negative angle part 3 to be shaped. Step 2: Slider Locking Step When the slider assembly 2 moves to the working position, compressed air is introduced into the air inlet of the first cylinder 106, causing the piston rod of the first cylinder 106 to extend. Through the cylinder connecting rod 109, the base moving block 110 is driven to move from the retracted position to the working position, so that the limiting working surface of the base moving block 110 forms a rigid abutment with the mating surface of the cylinder stop block 202 at the rear end of the slider assembly 2, establishing an insurmountable mechanical block in the retracted direction of the slider assembly 2, and locking the slider assembly 2 in the working position. Step 3: Mold Closing and Shaping With the slider assembly 2 locked in the working position, the press slider of the stamping die is driven to move downward, so that the upper die assembly and the lower die assembly close together. The shaping insert 4 located in the working position applies a shaping force to the negative angle area of ​​the negative angle part 3 to complete the negative angle shaping process. Step 4: Mold Opening Steps After the shaping process is completed, the press slide is driven to move upward, so that the upper mold assembly and the lower mold assembly are separated, providing space for the subsequent slide retraction and part removal; Step 5: Limiter Unlocking Steps Compressed air is introduced into the air outlet of the first cylinder 106, causing the piston rod of the first cylinder 106 to retract. The base moving block 110 is pulled from the working position to the retracted position through the cylinder connecting rod 109, so that the limiting working surface of the base moving block 110 is disengaged from the mating surface of the cylinder stop block 202, thereby releasing the restriction on the retracted movement of the slider assembly 2. Step Six: Slider Reverse Step Compressed air is introduced into the air outlet of the second cylinder 107, causing the piston rod of the second cylinder 107 to retract. The slider assembly 2 is pulled from the working position to the initial position in a straight line through the slider connecting block 203, so that the shaping insert 4 is completely separated from the negative angle area of ​​the negative angle part 3, forming a clearance space for demolding the part. Step 7: Part Removal Procedure The negative angle part 3, after completing the shaping process, is removed from the stamping die, thus completing a complete shaping cycle of the negative angle part 3.

[0033] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A linear upward-sloping mechanism, characterized in that, It includes a base assembly and a slider assembly. The base assembly is used to be fixedly connected to the stamping die. The bottom of the slider assembly is slidably disposed above the base assembly. The front end of the slider assembly is used to install a shaping insert to shape the part. The base assembly includes a first cylinder, a second cylinder, a cylinder connecting rod, and a base moving block. The second cylinder is installed at the rear end of the base assembly and is used to drive the slider assembly to reciprocate in a straight line. The first cylinder is installed on the side of the base assembly and is connected to the base moving block through the cylinder connecting rod, and is used to drive the base moving block to switch between the working position and the retracting position. The slider assembly is provided with a cylinder stop. When the base moving block is in the working position, the base moving block abuts against the cylinder stop to restrict the slider assembly from retracting.

2. The linear oblique upward mechanism according to claim 1, characterized in that, The base assembly further includes a convex guide plate, and the slider assembly further includes a V-shaped guide plate. The V-shaped guide plate is installed at the lower end of the slider assembly, and the convex guide plate is installed on the inner cavity of the base assembly. The V-shaped guide plate and the convex guide plate slide together to form a V-shaped sliding guide structure.

3. The linear inclined upward mechanism according to claim 2, characterized in that, The sliding friction pair between the V-shaped guide plate and the convex guide plate adopts a copper-to-steel friction fit.

4. The linear oblique upward mechanism according to claim 1, characterized in that, There are two first cylinders, which are respectively installed on both sides of the base assembly.

5. The linear oblique upward mechanism according to claim 1, characterized in that, The base assembly also includes a pneumatic switch and a pneumatic valve. The pneumatic valve is used to control the on / off and reversal of the air passages of the first cylinder and the second cylinder. The pneumatic switch is used to detect the position of the slider assembly and control the action sequence of the first cylinder.

6. The linear oblique upward mechanism according to claim 1, characterized in that, The base assembly also includes a guide plate, which is installed in the rear end cavity of the base assembly to provide sliding guidance for the slider assembly.

7. The linear oblique upward mechanism according to claim 1, characterized in that, The base assembly also includes a pressure plate and a positioning key. The pressure plate is installed on both end faces of the base assembly, and the positioning key is installed on the bottom surface of the base assembly for positioning and installation between the base assembly and the stamping die.

8. The linear oblique upward mechanism according to claim 1, characterized in that, The slider assembly further includes a slider connecting block and a cylinder fixing plate. Both the slider connecting block and the cylinder fixing plate are installed at the rear end of the slider assembly. The slider connecting block is used to connect with the piston rod of the second cylinder, and the cylinder fixing plate is used to fix the second cylinder.

9. A stamping die, characterized in that, Including the linear upward-sloping mechanism as described in any one of claims 1 to 8.

10. A method for shaping a negative angle part using a linear oblique upward mechanism as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Drive the second cylinder to move the slider assembly in a straight line to the working position; Drive the first cylinder to move the base moving block to the working position. The base moving block abuts against the cylinder stop block to restrict the slide block from retracting and to perform negative angle part shaping. After the shaping is completed, the first cylinder is driven to move the base moving block to the retracted position, thereby releasing the restriction on the slider assembly; The second cylinder is driven to retract the slider assembly to its initial position, avoiding the negative angle component.

Images