Stamping positioning tool for die machining and positioning method of stamping positioning tool

Abstract

The invention relates to a positioning tool, in particular to a stamping positioning tool for die machining and a positioning method of the stamping positioning tool. The device comprises a base, a base plate is fixedly installed on the upper side wall of the base, two side plates are fixedly installed on the upper side wall of the base plate in a front-back symmetry mode, a top plate is jointly and fixedly installed on the upper side walls of the two side plates, and a positioning cavity is formed among the top plate, the base plate and the two side plates. A servo motor drives a rotating rod to rotate to drive a moving plate and a clamping plate which are arranged on threads with opposite rotating directions at the two ends to move oppositely, so that the clamping plate and a barrier strip jointly restrain the degree of freedom of a thin steel plate in the horizontal direction and the vertical direction, and preliminary positioning is achieved; the inclined face of the wedge block drives the idler wheel and the connecting rod to move upwards, the positioning pin is driven to be accurately inserted into a pre-machined positioning hole of the thin steel plate, horizontal movement of the thin steel plate is accurately limited in a mechanical insertion mode, and finally high-precision positioning is achieved.

Description

Technical Field

[0001] This invention relates to a positioning fixture, and more specifically, to a stamping positioning fixture and positioning method for mold processing. Background Technology

[0002] Stamping dies are a key type of process equipment used in industrial production to form or separate sheet metal. Blanking dies are a type of stamping die, specifically used to separate sheet metal along a closed contour to obtain workpieces of the desired shape. When using blanking dies to continuously blank thin steel plate 5 (steel plate with a thickness of less than 3 mm), the thin steel plate 5 must be precisely positioned. This is because after each feeding, the thin steel plate 5 must be precisely fixed to ensure that the die punch can be strictly aligned with the blanking area, thereby ensuring that the blanked workpiece has a clear outline and accurate dimensions, and avoiding damage to the punch and die due to positional deviation.

[0003] However, in existing technologies, especially in continuous automated punching production lines for thin steel plates 5, traditional positioning methods generally suffer from the limitations of action separation and asynchrony: common strategies involve using an independent drive source to first perform lateral clamping and then vertical pressing, or relying on manual intervention to achieve positioning. This step-by-step, non-linkage operation method is difficult to match the production rhythm of high-speed automation, which not only slows down the overall pace, but more importantly, during the short interval between the completion of lateral clamping and the initiation of vertical pressing, the thin steel plate 5 is in a state of only partial constraint. Under the influence of punching vibration, it is prone to slight warping or small in-plane movement. Such deviations that are not suppressed in time will cause the actual position of the thin steel plate 5 to deviate from the preset station at the moment of punching, which will lead to incomplete punching contours, increased burrs, and even scrapping of the entire workpiece. Summary of the Invention

[0004] The purpose of this invention is to provide a stamping positioning fixture and its positioning method for mold processing, so as to solve the problems mentioned in the background art above: During the brief interval between the completion of lateral clamping and the initiation of vertical clamping, the thin steel plate is in a state of only partial constraint and is prone to slight warping or minute in-plane movement under the influence of stamping vibration.

[0005] To address the aforementioned problems, one objective of this invention is to provide a stamping positioning fixture and its positioning method for mold processing. The fixture includes a base, a pad fixedly mounted on the upper side wall of the base, two side plates symmetrically fixedly mounted on the upper side wall of the pad, and a top plate fixedly mounted on the upper side wall of the two side plates. A positioning cavity is formed between the top plate, the pad, and the two side plates. A thin steel plate is located inside the positioning cavity. A through groove is formed on each side plate, and a clamping plate is slidably mounted inside the through groove. A stop strip is integrally formed on the top of each clamping plate on the side closest to each other. A device for driving the two clamping plates is provided on the upper side of the base. The displacement mechanism moves in opposite or opposite directions. Positioning holes are provided at the four corners of the positioning cavity on the thin steel plate. Guide grooves are provided on the pad plate at the positions corresponding to each positioning hole. Positioning pins are slidably installed inside the guide grooves. A lifting mechanism is provided on the base to drive the positioning pins to move vertically. When the displacement mechanism drives the two clamping plates to move closer to each other, the two clamping plates contact the front and rear sides of the thin steel plate respectively. The baffle and the pad contact the upper and lower sides of the thin steel plate respectively. At the same time, the displacement mechanism drives the lifting mechanism, which moves the positioning pins upward so that the positioning pins are inserted into the corresponding positioning holes.

[0006] As a further improvement to this technical solution, the displacement mechanism includes two rotating rods that are symmetrically mounted on the upper side of the base, and the rotating rods rotate through the front and rear sides of the pad. Two threaded grooves with opposite directions are respectively opened on the rotating rods near the two ends.

[0007] As a further improvement to this technical solution, a speed reducer is fixedly installed on the upper side wall of the base at the position corresponding to each rotating rod. The output shaft of the speed reducer is coaxially and fixedly connected to the corresponding rotating rod through a coupling. A servo motor is fixedly installed on one side of the speed reducer, and the output shaft of the servo motor is coaxially and fixedly connected to the input shaft of the speed reducer through a coupling.

[0008] As a further improvement to this technical solution, a movable plate is fixedly installed on the side of the clamping plate away from the center of the pad, and the movable plate is threadedly connected to the threaded groove of the two rotating rods located on the same side of the pad.

[0009] As a further improvement to this technical solution, two movable grooves are symmetrically opened on the left and right sides of the pad, and the movable grooves pass through the front and rear sides of the pad. The four guide grooves are respectively connected to the interior of the two movable grooves.

[0010] As a further improvement to this technical solution, the lifting mechanism includes a connecting rod slidably installed inside the movable slot. The connecting rod is fixedly connected to two positioning pins located in the same movable slot. Both ends of the connecting rod extend to the outside of the movable slot and are rotatably mounted with rollers.

[0011] As a further improvement to this technical solution, extension rods are fixedly installed at both ends of the moving plate, and wedges are fixedly installed at the other end of the extension rods. The side of the wedges closest to the pad is set as an inclined surface, and the inclined surface of the wedges makes rolling contact with the corresponding rollers.

[0012] As a further improvement to this technical solution, the top of the connecting rod is vertically fixedly installed with slide rods at the front and rear sides of the pad, and a fixing frame is fixedly installed at the position corresponding to each slide rod on the side plate. The upper end of the slide rod slides through the corresponding fixing frame and extends upward.

[0013] As a further improvement to this technical solution, a convex ring is fixedly installed on the slide rod, and a return spring sleeved on the slide rod is fixedly connected between the upper side wall of the convex ring and the fixing frame. The return spring pushes the convex ring away from the fixing frame.

[0014] The second objective of this invention is to provide a method for positioning thin steel plates using a stamping positioning fixture that includes the above-described mold processing, comprising the following steps: S1. The displacement mechanism drives the two moving plates to move towards each other, so that the two clamping plates contact the front and rear sides of the thin steel plate respectively. S2. When the two clamping plates come into contact with the thin steel plate, the baffle and the pad respectively come into contact with the upper and lower sides of the thin steel plate. S3. During the process of the displacement mechanism driving the moving plates to move towards each other, the moving plates drive the lifting mechanism, and the lifting mechanism drives the positioning pin to move upward. When the clamping plate contacts the thin steel plate, the positioning pin is inserted into the corresponding positioning hole.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the stamping positioning fixture and positioning method of this mold processing, the rotating rod is driven by a servo motor to rotate, which drives the moving plate and clamping plate on the opposite threads at both ends to move towards each other. The clamping plate and the stop bar together constrain the degree of freedom of the thin steel plate in the horizontal and vertical directions, achieving preliminary positioning. At the same time, the moving plate pushes the wedge block to move horizontally through the extension rod. The inclined surface of the wedge block drives the roller and connecting rod to move upward, which drives the positioning pin to accurately insert into the positioning hole pre-machined in the thin steel plate. The horizontal movement of the thin steel plate is precisely restricted by mechanical interlocking, and high-precision positioning is finally achieved. This process is controlled by electromechanical coordination, which not only ensures the positional stability of the thin steel plate during stamping and improves the forming quality and dimensional consistency of the workpiece, but also automatically releases the positioning after stamping by the motor reversal and the action of the return spring. With the help of the conveying equipment, continuous and efficient automated production can be achieved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention and the structure after the thin steel plate is combined; Figure 2This is one of the cross-sectional views of the overall structure of the present invention combined with the thin steel plate; Figure 3 This is a schematic diagram of the structure of the present invention after combining a portion of the structure with a thin steel plate; Figure 4 This is a schematic diagram of the displacement mechanism and clamping plate of the present invention; Figure 5 This is a schematic diagram of the structure of the clamping plate of the present invention; Figure 6 This is a second cross-sectional view of the overall structure and the thin steel plate assembly of the present invention; Figure 7 This is the third sectional view of the overall structure of the present invention and the thin steel plate assembly; Figure 8 This is a cross-sectional view of part of the structure of the present invention combined with a thin steel plate; Figure 9 This is a partial structural schematic diagram of the present invention; Figure 10 For the present invention Figure 9 Enlarged view of the structure at point A in the middle; Figure 11 This is a partial structural schematic diagram of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 1. Base; 2. Pad; 21. Movable groove; 22. Guide groove; 3. Side plate; 31. Through groove; 4. Top slab; 5. Thin steel plate; 51. Positioning holes; 6. Clamping plate; 61. Stop bar; 7. Displacement mechanism; 71. Rotating rod; 72. Reducer; 73. Servo motor; 74. Moving plate; 8. Positioning pin; 9. Lifting mechanism; 91. Connecting rod; 92. Extension rod; 93. Wedge block; 94. Guide rail; 95. Roller; 96. Slide rod; 961. Convex ring; 97. Fixing frame; 98. Return spring. Detailed Implementation

[0018] 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.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Example 1 Please see Figure 1 and Figure 2 As shown, one of the objectives of this embodiment is to provide a stamping positioning fixture for mold processing, including a base 1, a pad 2 fixedly installed on the upper side wall of the base 1, two side plates 3 symmetrically fixedly installed on the upper side wall of the pad 2, and a top plate 4 fixedly installed on the upper side wall of the two side plates 3. A forming groove is provided on the top plate 4, which is consistent with the target shape of the workpiece to be stamped. A blanking groove is also provided on the base 1 and the pad 2 at the position corresponding to the forming groove, for demolding of the workpiece.

[0022] The top plate 4, the pad plate 2, and the two side plates 3 together constitute the lower die part of the punching die. A positioning cavity is formed between the top plate 4, the pad plate 2, and the two side plates 3. The thin steel plate 5 is located inside the positioning cavity, and the lower side wall of the thin steel plate 5 slides in contact with the upper side wall of the pad plate 2, thereby obtaining effective support.

[0023] During use, the external conveying equipment continuously feeds the thin steel plate 5 into the positioning cavity. The upper die of the punching die is equipped with a punch, which moves downward under the drive of the hydraulic equipment, passes through the forming groove of the top plate 4, and punches the thin steel plate 5. The punched-off workpieces fall to the bottom of the base 1 through the blanking groove, completing the automatic unloading. With the periodic up and down movement of the punch and the continuous advancement of the thin steel plate 5 by the conveying device, multiple workpieces can be continuously punched on the thin steel plate 5. The conveying equipment and the upper die of the punching die are existing technologies, so they will not be described in detail here.

[0024] In order to accurately position the thin steel plate 5 inside the positioning cavity, refer to Figures 3-5A through groove 31 is provided on the side plate 3. A clamping plate 6 is slidably installed inside the through groove 31. The thickness of the clamping plate 6 is greater than that of the thin steel plate 5. The top of the two clamping plates 6 on the side that is close to each other is integrally formed with a baffle 61. The distance between the baffle 61 and the lower side wall of the clamping plate 6 is adapted to the thickness of the thin steel plate 5. A chamfer is provided on the side of the lower side wall of the baffle 61 away from the clamping plate 6 so that the thin steel plate 5 can smoothly enter under the baffle 61. A displacement mechanism 7 is provided on the upper side of the base 1 for driving the two clamping plates 6 to move in opposite or opposite directions. When the displacement mechanism 7 drives the two clamping plates 6 to move closer to each other, the two clamping plates 6 contact the front and rear sides of the thin steel plate 5 respectively, restricting its horizontal movement in the front and rear directions. At the same time, the baffle 61 and the pad 2 contact the upper and lower sides of the thin steel plate 5 respectively, restricting its vertical movement, thereby achieving the initial positioning of the thin steel plate 5.

[0025] The structure of the displacement mechanism 7 is detailed below. The displacement mechanism 7 includes two symmetrically rotating rods 71 ​​mounted on the upper side of the base 1. The rods 71 ​​rotate through the front and rear sides of the pad 2. Two threaded grooves with opposite directions are opened near the two ends of the rods 71. A reducer 72 is fixedly installed on the upper side wall of the base 1 at the position corresponding to each rod 71. The output shaft of the reducer 72 is coaxially fixedly connected to the corresponding rod 71 through a coupling. A servo motor 73 with adjustable output shaft rotation direction is fixedly installed on one side of the reducer 72. The output shaft of the servo motor 73 is coaxially fixedly connected to the input shaft of the reducer 72 through a coupling. A movable plate 74 is fixedly installed on the side of the clamping plate 6 away from the center of the pad 2. The movable plate 74 is threadedly connected to the threaded grooves of the two rods 71 ​​on the same side of the pad 2.

[0026] Both servo motors 73 are electrically connected to an external control device. After the control device starts the two servo motors 73 synchronously, the servo motors 73 drive the input shaft of the corresponding reducer 72 to rotate. After the reducer 72 reduces the speed and increases the torque, it drives the rotating rod 71 to rotate. The two rotating rods 71 ​​rotate in the same direction. Since the threaded grooves connected to the two moving plates 74 rotate in opposite directions, the two moving plates 74 move towards each other along the axis of the rotating rod 71. The moving plates 74 drive the corresponding clamping plates 6 to move synchronously, so that the two clamping plates 6 contact the front and rear sides of the thin steel plate 5 respectively, and complete the clamping and positioning.

[0027] It should be noted that the conveying equipment is also electrically connected to an external control device. After the conveying equipment has conveyed the thin steel plate 5 a predetermined distance and adjusted its position within the positioning cavity, the servo motor 73 is automatically activated to drive the clamping plate 6 to restrict the position of the thin steel plate 5. The movement distance of the clamping plate 6 is precisely calculated to ensure that the final distance between the two clamping plates 6 is adapted to the width of the thin steel plate 5, thus both limiting the movement of the thin steel plate 5 and preventing damage to the thin steel plate 5 due to over-clamping. The technologies for controlling the conveying distance of the thin steel plate 5 by the conveying equipment and for controlling the movement distance of the clamping plate 6 by the servo motor 73 are existing technologies and will not be described in detail here.

[0028] To further improve the positioning accuracy of the thin steel plate 5, refer to Figures 6-8 Positioning holes 51 are provided on the thin steel plate 5 near the four corners of the positioning cavity. Guide grooves 22 are provided on the pad 2 at the positions corresponding to each positioning hole 51. Positioning pins 8 are slidably installed inside the guide grooves 22. It should be noted that there are multiple positioning holes 51. These positioning holes 51 are arranged in a certain pattern so that every time the thin steel plate 5 moves by one step, a positioning unit consisting of four positioning holes 51 moves to the position corresponding to the four positioning pins 8 to position a punching area. The size of the punching area is larger than the size of a single workpiece. Every time the conveying equipment conveys the thin steel plate 5, a punching area moves to the position corresponding to the forming groove. When the punching area moves to the position corresponding to the forming groove, there are always four positioning holes 51 and four positioning pins 8 roughly corresponding to each other.

[0029] Meanwhile, a lifting mechanism 9 is provided on the base 1 to drive the positioning pin 8 to move vertically. When the displacement mechanism 7 drives the two clamping plates 6 to move towards each other, the displacement mechanism 7 synchronously drives the lifting mechanism 9, so that the lifting mechanism 9 drives the positioning pin 8 to move upward, so that the positioning pin 8 is inserted into the corresponding positioning hole 51. The upper edge of the positioning pin 8 is chamfered, which can be finely adjusted and corrected when contacting the thin steel plate 5 to ensure smooth insertion. The outer diameter of the positioning pin 8 is adapted to the inner diameter of the positioning hole 51, which can restrict the horizontal movement of the thin steel plate 5, thereby achieving accurate positioning and ensuring the stamping quality.

[0030] Two movable slots 21 are symmetrically formed on the left and right sides of the pad 2. The movable slots 21 extend through the front and rear sides of the pad 2. Four guide slots 22 are respectively connected to the interior of the two movable slots 21. The movable slots 21 provide installation space for the lifting mechanism 9. The structure of the lifting mechanism 9 is described in detail below, referring to... Figures 9-11 The lifting mechanism 9 includes a connecting rod 91 slidably installed inside the movable groove 21. The connecting rod 91 is fixedly connected to two positioning pins 8 located in the same movable groove 21. Both ends of the connecting rod 91 extend to the outside of the movable groove 21 and are rotatably mounted with rollers 95. Both ends of the moving plate 74 are fixedly mounted with extension rods 92. The other end of the extension rod 92 is fixedly mounted with a wedge 93. The side of the wedge 93 closest to the pad 2 is set as an inclined surface. The inclined surface of the wedge 93 rolls in contact with the corresponding roller 95. In order to improve the stability of the wedge 93 during movement, a guide rail 94 is slidably installed at the bottom of the wedge 93. The guide rail 94 is fixedly installed on the upper side wall of the base 1.

[0031] In the initial state, the upper end of the positioning pin 8 is located inside the guide groove 22 to avoid obstructing the movement of the thin steel plate 5. When the displacement mechanism 7 drives the two moving plates 74 to move towards each other, the moving plates 74 drive the wedge block 93 to move synchronously through the extension rod 92. The wedge block 93 pushes the roller 95 to move up along the inclined surface, thereby driving the connecting rod 91 and the positioning pin 8 to move up, and finally the positioning pin 8 is inserted into the positioning hole 51 to achieve precise positioning.

[0032] After one punching is completed, the thin steel plate 5 needs to be moved to adjust its position. The steps are as follows: The control equipment controls the output shafts of two servo motors 73 to rotate synchronously in opposite directions, driving two moving plates 74 to move in opposite directions. The moving plates 74 drive the clamping plates 6 to move synchronously, so that the stop bar 61 is disengaged from the thin steel plate 5, releasing the initial positioning. At the same time, the moving plates 74 drive the wedge block 93 away from the pad plate 2 through the extension rod 92. The roller 95 rolls down the inclined plane under the action of gravity, driving the connecting rod 91 and the positioning pin 8 to move down, so that the positioning pin 8 is withdrawn from the positioning hole 51, completely releasing the positioning of the thin steel plate 5. Then the conveying equipment transports the thin steel plate 5 for the next punching process.

[0033] To ensure that the positioning pin 8 can overcome the friction between itself and the positioning hole 51 and move down smoothly, a slide rod 96 is vertically fixedly installed on the top of the connecting rod 91 at the front and rear sides of the pad 2. A fixing bracket 97 is fixedly installed on the side plate 3 at the position corresponding to each slide rod 96. The upper end of the slide rod 96 slides through the corresponding fixing bracket 97 and extends upward. A convex ring 961 is fixedly installed on the slide rod 96. A return spring 98 sleeved on the slide rod 96 is fixedly connected between the upper side wall of the convex ring 961 and the fixing bracket 97. The return spring 98 pushes the convex ring 961 away from the fixing bracket 97.

[0034] When the wedge 93 pushes the roller 95 upward, the connecting rod 91 drives the slide rod 96 and the convex ring 961 upward, reducing the distance between the convex ring 961 and the fixed frame 97. The return spring 98 is compressed and contracts. When the moving plate 74 drives the wedge 93 away from the pad plate 2 through the extension rod 92, the return spring 98 rebounds and pushes the convex ring 961 downward, thereby driving the connecting rod 91 and the positioning pin 8 back to their initial positions, ensuring continuous positioning function.

[0035] When in use, the device drives the rotating rod 71 to rotate via the servo motor 73, which in turn drives the moving plate 74 and the clamping plate 6, which are on opposite threads at both ends, to move towards each other. This allows the clamping plate 6 and the stop bar 61 to jointly constrain the degree of freedom of the thin steel plate 5 in the horizontal and vertical directions, achieving initial positioning. At the same time, the moving plate 74 pushes the wedge block 93 to move horizontally via the extension rod 92. The inclined surface of the wedge block 93 drives the roller 95 and the connecting rod 91 to move upward, causing the positioning pin 8 to be precisely inserted into the pre-machined positioning hole 51 of the thin steel plate 5. The horizontal movement of the thin steel plate 5 is precisely restricted by mechanical interlocking, ultimately achieving high-precision positioning. This process, through electromechanical coordinated control, not only ensures the positional stability of the thin steel plate 5 during punching and improves the forming quality and dimensional consistency of the workpiece, but also automatically releases the positioning after punching by the reverse rotation of the servo motor 73 and the action of the return spring 98. This, combined with the conveying equipment, enables continuous and efficient automated production.

[0036] The second objective of this invention is to provide a method for positioning a thin steel plate 5 using a stamping positioning fixture that includes the above-described mold processing, comprising the following steps: S1. The displacement mechanism 7 drives the two moving plates 74 to move towards each other, so that the two clamping plates 6 contact the front and rear sides of the thin steel plate 5 respectively. S2. When the two clamping plates 6 come into contact with the thin steel plate 5, the baffle 61 and the pad 2 come into contact with the upper and lower sides of the thin steel plate 5 respectively. S3. During the process of the displacement mechanism 7 driving the moving plate 74 to move towards each other, the moving plate 74 drives the lifting mechanism 9, and the lifting mechanism 9 drives the positioning pin 8 to move upward. When the clamping plate 6 contacts the thin steel plate 5, the positioning pin 8 is inserted into the corresponding positioning hole 51.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A stamping positioning fixture for mold processing, comprising a base (1), wherein a pad (2) is fixedly installed on the upper side wall of the base (1), and two side plates (3) are symmetrically fixedly installed on the upper side wall of the pad (2), and a top plate (4) is fixedly installed on the upper side wall of the two side plates (3), wherein a positioning cavity is formed between the top plate (4), the pad (2), and the two side plates (3), and a thin steel plate (5) is located inside the positioning cavity, characterized in that: A through groove (31) is provided on the side plate (3), and a clamping plate (6) is slidably installed inside the through groove (31). The top of the two clamping plates (6) on the side closest to each other is integrally formed with a baffle (61). A displacement mechanism (7) for driving the two clamping plates (6) to move in opposite or opposite directions is provided on the upper side of the base (1). Positioning holes (51) are provided on the thin steel plate (5) near the four corners of the positioning cavity. A guide groove (22) is provided on the pad (2) at the position corresponding to each positioning hole (51). The inner part of the guide groove (22) The base (1) is equipped with a slidable positioning pin (8). The base (1) is provided with a lifting mechanism (9) for driving the positioning pin (8) to move vertically. When the displacement mechanism (7) drives the two clamping plates (6) to approach each other, the two clamping plates (6) contact the front and rear sides of the thin steel plate (5) respectively. The baffle (61) and the pad (2) contact the upper and lower sides of the thin steel plate (5) respectively. At the same time, the displacement mechanism (7) drives the lifting mechanism (9) to move the positioning pin (8) upward, so that the positioning pin (8) is inserted into the corresponding positioning hole (51).

2. The stamping positioning fixture for mold processing according to claim 1, characterized in that: The displacement mechanism (7) includes two rotating rods (71) that are symmetrically mounted on the upper side of the base (1). The rotating rods (71) rotate through the front and rear sides of the pad (2). Two threaded grooves with opposite directions are respectively opened on the rotating rods (71) near the two ends.

3. The stamping positioning fixture for mold processing according to claim 2, characterized in that: A speed reducer (72) is fixedly installed on the upper side wall of the base (1) at the position corresponding to each rotating rod (71). The output shaft of the speed reducer (72) is coaxially fixedly connected to the corresponding rotating rod (71) through a coupling. A servo motor (73) is fixedly installed on one side of the speed reducer (72). The output shaft of the servo motor (73) is coaxially fixedly connected to the input shaft of the speed reducer (72) through a coupling.

4. The stamping positioning fixture for mold processing according to claim 3, characterized in that: A movable plate (74) is fixedly installed on the side of the clamping plate (6) away from the center of the pad (2). The movable plate (74) is threadedly connected to the threaded groove of the two rotating rods (71) on the same side of the pad (2).

5. The stamping positioning fixture for mold processing according to claim 4, characterized in that: The pad (2) has two symmetrical movable grooves (21) on the left and right sides. The movable grooves (21) pass through the front and rear sides of the pad (2). The four guide grooves (22) are respectively connected to the interior of the two movable grooves (21).

6. The stamping positioning fixture for mold processing according to claim 5, characterized in that: The lifting mechanism (9) includes a connecting rod (91) that is slidably installed inside the movable slot (21). The connecting rod (91) is fixedly connected to two positioning pins (8) that are in the same movable slot (21). Both ends of the connecting rod (91) extend to the outside of the movable slot (21) and are rotatably mounted with rollers (95).

7. The stamping positioning fixture for mold processing according to claim 6, characterized in that: Both ends of the movable plate (74) are fixedly installed with extension rods (92), and the other end of the extension rods (92) is fixedly installed with wedges (93). The side of the wedges (93) closest to the pad (2) is set as an inclined surface, and the inclined surface of the wedges (93) rolls in contact with the corresponding rollers (95).

8. The stamping positioning fixture for mold processing according to claim 6, characterized in that: The top of the connecting rod (91) is vertically fixed with slide rods (96) at the front and rear sides of the pad (2). The side plate (3) is fixed with a fixing frame (97) at the position corresponding to each slide rod (96). The upper end of the slide rod (96) slides through the corresponding fixing frame (97) and extends upward.

9. The stamping positioning fixture for mold processing according to claim 8, characterized in that: A protruding ring (961) is fixedly installed on the slide rod (96). A return spring (98) sleeved on the slide rod (96) is fixedly connected between the upper side wall of the protruding ring (961) and the fixing frame (97). The return spring (98) pushes the protruding ring (961) away from the fixing frame (97).

10. A method for positioning a thin steel plate using a stamping positioning fixture that performs die processing according to any one of claims 1-9, characterized in that: The methods and steps include the following: S1. The displacement mechanism (7) drives the two moving plates (74) to move towards each other, so that the two clamping plates (6) contact the front and rear sides of the thin steel plate (5) respectively. S2. When the two clamps (6) come into contact with the thin steel plate (5), the baffle (61) and the pad (2) come into contact with the upper and lower sides of the thin steel plate (5) respectively. S3. During the process of the displacement mechanism (7) driving the moving plate (74) to move towards each other, the moving plate (74) drives the lifting mechanism (9), and the lifting mechanism (9) drives the positioning pin (8) to move upward. When the clamping plate (6) contacts the thin steel plate (5), the positioning pin (8) is inserted into the corresponding positioning hole (51).

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