A stop device for a blanking press

Abstract

The utility model relates to blank stamping forming technical field, and its in order to solve the existing lifting stamping device, the body is easy to produce the shaking, causes the presser head or punch to be not easy to align, leads to the problem that the precision of the formed product obtained is not high, the utility model provides a kind of for blank forming press's stop device, including punch, main shaft, sliding block, shaft seat, sliding sleeve and female die plate;Shaft seat is located at the bottom of sliding block and is connected with female die plate;Sliding sleeve is worn in shaft seat and is connected with shaft seat;Main shaft is worn into sliding sleeve and is connected with sliding sleeve sliding fit;Punch is equipped at the end of sliding sleeve far from sliding block;The utility model is through main shaft and is worn into sliding sleeve and is connected with sliding sleeve " sliding fit", and sliding sleeve is fixed frame with sliding block, female die plate through shaft seat and forms rigidity, and then main shaft does axial sliding in sliding sleeve, sliding sleeve inner wall forms the circumferential constraint to main shaft, limits the radial shaking of main shaft, improves the precision of punch stamping, guarantees the quality after blank forming.

Description

Technical Field

[0001] This utility model relates to the field of blank stamping technology, and more specifically, to a limiting device for a blank forming press. Background Technology

[0002] The micro powder metallurgy forming press is a key piece of equipment in the powder metallurgy process. Its press head is responsible for pressing metal powder or alloy powder into tiny parts or products of various shapes.

[0003] During the pressing process, the press head provides strong pressure through a hydraulic or mechanical transmission system. When metal powder is filled into the mold, the press head descends and contacts the powder inside the mold. As the pressure gradually increases, the powder particles are tightly bonded together to form a blank with a certain strength and density. However, during the pressing process, the presence of the hydraulic or mechanical transmission system causes the entire press body to shake. This results in the press head not being able to accurately align with the mold when pressing small products, leading to a low product qualification rate. Based on the above description, there is an urgent need for a limiting device that can stably limit the pressure head of a forming press and improve the accuracy of pressing. Utility Model Content

[0004] The purpose of this utility model is to provide a limiting device for a blank forming press, which aims to solve the technical problem that when the existing lifting and stamping device is used to form pressed parts, the machine body is prone to shaking, which makes it difficult to align the press head or punch, resulting in low precision and low quality of the formed products.

[0005] The embodiments of this utility model are achieved through the following technical solutions: A limiting device for a billet forming press includes a punch, a main shaft, a slider, a bearing seat, a sliding sleeve, and a concave template; the bearing seat is located at the bottom of the slider and connected to the concave template; the sliding sleeve passes through the bearing seat and is connected to the bearing seat; the main shaft passes through the sliding sleeve and is slidably connected to the sliding sleeve; the punch is located at the end of the sliding sleeve away from the slider.

[0006] Preferably, the slider includes a first recessed opening and a second hollowed-out portion; the second hollowed-out portion is provided with a locking ring; the main shaft is connected to the sliding sleeve via a screw; the end of the screw away from the sliding sleeve passes through the first recessed opening and the locking ring in sequence.

[0007] Preferably, the slider further includes a third opening recess; the third opening recess is fitted with a positioning component; one end of the screw that extends out of the locking ring passes into the third opening recess and is connected to the positioning component.

[0008] Preferably, the positioning assembly includes a positioning block and a positioning bolt; the positioning block has an axial through hole and a radial opening communicating with the axial through hole; the end of the screw away from the sliding sleeve passes through the axial through hole; the positioning bolt passes through the radial opening and abuts against the end of the screw that passes through the axial through hole; the positioning bolt is connected to the positioning block.

[0009] Preferably, the bottom of the positioning block is provided with an arc-shaped bottom wall that matches the third opening recess.

[0010] Preferably, the middle section of the sliding sleeve is provided with a flange ring; the bearing seat is provided with a plurality of threaded holes that match the flange ring; one end of the sliding sleeve passes through the bearing seat and is connected to the top of the bearing seat through the flange ring.

[0011] Preferably, the end of the sliding sleeve away from the flange ring is located at the adjusting nut; the adjusting nut is sleeved on the screw and abuts against the end of the main shaft away from the punch; the adjusting nut is connected to the screw.

[0012] Preferably, the end of the sliding sleeve away from the punch has a flared opening for the adjustment nut to be inserted.

[0013] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: This invention features a main shaft that passes through a sliding sleeve and is "slidingly connected" to the sliding sleeve. The sliding sleeve forms a rigid fixed frame with the slide block and the concave template through a shaft seat. When the main shaft slides axially within the sliding sleeve, the inner wall of the sliding sleeve forms a circumferential constraint on the main shaft, limiting its radial wobble. Compared to traditional structures without guidance or with large gaps, the sliding connection method in this embodiment can limit the movement trajectory of the main shaft to the axial direction of the sliding sleeve and ensure that the punch does not deviate when moving with the main shaft. This improves the accuracy of punching and guarantees the quality of the formed blank. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged schematic diagram of local structure A in the middle; Figure 3 This is a three-dimensional structural diagram of the positioning component of this utility model.

[0016] Icons: 1-Punch, 2-Spindle, 3-Slider, 31-First opening recess, 32-Second hollow section, 33-Third opening recess, 4-Shaft seat, 5-Sliding sleeve, 51-Flanged opening, 6-Concave template, 7-Locking ring, 8-Positioning assembly, 81-Positioning block, 811-Axial through hole, 812-Radial opening, 82-Positioning bolt, 9-Screw, 10-Adjusting nut, 11-Flange ring. Detailed Implementation

[0017] Example 1 Please see Figures 1 to 3 The present invention provides the following technical solution: a limiting device for a billet forming press, which is suitable for the case of a billet forming press for precise stamping to shape billets.

[0018] Specifically, such as Figure 1 and Figure 2 As shown, a limiting device for a billet forming press includes a punch 1, a main shaft 2, a slider 3, a bearing 4, a sliding sleeve 5, and a concave template 6; the bearing 4 is located at the bottom of the slider 3 and connected to the concave template 6; the sliding sleeve 5 passes through the bearing 4 and is connected to the bearing 4; the main shaft 2 passes through the sliding sleeve 5 and is slidably connected to the sliding sleeve 5; the punch 1 is located outside the sliding sleeve 5 at the end away from the slider 3.

[0019] In this embodiment, the sliding sleeve 5 passes through the bearing seat 4 and is fixedly connected to the bearing seat 4. The main shaft 2 passes through the sliding sleeve 5 and is "slidingly connected" with the sliding sleeve 5. The sliding sleeve 5 forms a rigid fixed frame with the slider 3 and the concave template 6 through the bearing seat 4. When the main shaft 2 slides axially in the sliding sleeve 5, the inner wall of the sliding sleeve 5 forms a circumferential constraint on the main shaft 2, limiting the lateral (radial) sway of the main shaft 2. Compared with the traditional structure without guidance or with large gap, the sliding connection method in this embodiment can limit the movement trajectory of the main shaft 2 to the axial direction of the sliding sleeve 5 and ensure that the punch 1 does not "deviate" when it moves with the main shaft 2, thereby improving the stamping accuracy of the punch 1 and ensuring the quality of the blank after forming.

[0020] In this embodiment, the slider 33 is installed on the frame of the press. Specifically, its two ends are slidably connected to a pair of guide grooves pre-assembled on the frame. Then, the lifting mechanism set on the top of the frame (such as the hydraulically driven lifting device commonly used in the art, whose working principle is: high pressure oil is provided by a hydraulic pump, and the oil is controlled to enter the rodless chamber or rod chamber of the oil cylinder by a control valve group, pushing the piston to drive the piston rod to extend and retract, thereby driving the slider 3 to move up and down) drives the slider 3 to move up and down in the vertical direction, thereby driving the main shaft 2, punch 1 and other parts to perform precise stamping operations.

[0021] Specifically, such as Figure 1 and Figure 2As shown, the slider 3 includes a first recessed opening 31 and a second hollowed-out portion 32; the second hollowed-out portion 32 is provided with a locking ring 7; the main shaft 2 is connected to the sliding sleeve 5 via a screw 9; the end of the screw 9 away from the sliding sleeve 5 passes through the first recessed opening 31 and the locking ring 7 in sequence. The slider 3 also includes a third recessed opening 33; the third recessed opening 33 is embedded with a positioning component 8; the end of the screw 9 that extends out of the locking ring 7 passes into the third recessed opening 33 and is connected to the positioning component 8. The positioning component 8 includes a positioning block 81 and a positioning bolt 82; the positioning block 81 is provided with an axial through hole 811 and a radial opening 812 communicating with the axial through hole; the end of the screw 9 away from the sliding sleeve 5 passes into the axial through hole 811; the positioning bolt 82 passes into the radial opening 812 and abuts against the end of the screw 9 that passes into the axial through hole 811; the positioning bolt 82 is connected to the positioning block 81.

[0022] In this embodiment, the main shaft 2 is connected to the sliding sleeve 5 via a screw 9. The screw 9 passes sequentially through the first opening recess 31 and the locking ring 7 of the slider 3, and finally enters the third opening recess 33 and connects with the positioning assembly 8 (including the positioning block 81 and the positioning bolt 82). The positioning bolt 82 abuts against the screw 9 through the radial opening 812, thereby fixing its axial and radial positions. The locking ring 7 is located in the second hollow part 32 of the slider 3, forming the first radial constraint on the screw 9 to prevent the screw 9 from swinging laterally during movement. The positioning assembly 8 rigidly abuts against the screw 9 through the positioning bolt 82, completely fixing the position of the screw 9 within the third opening recess 33 of the slider 3, preventing the screw 9 from axially shifting or radially deviating due to stamping vibration. This prevents relative displacement between the two due to gaps during the lifting and pressing process, ensuring the stability of the position reference of the punch 1. Finally, "multi-level locking" is achieved, thereby fixing the relative positions of the main shaft 2 and the slider 3.

[0023] Specifically, such as Figure 2 and Figure 3 As shown, the bottom of the positioning block 81 is provided with an arc-shaped bottom wall that matches the third opening recess 33.

[0024] In this embodiment, the arc-shaped bottom wall of the positioning block 81 matches the third opening recess 33, ensuring that the positioning block 81 and the slider 3 fit tightly without gaps or wobbling, thereby further enhancing the constraint accuracy of the screw 9.

[0025] Specifically, such as Figure 1 and Figure 2 As shown, the middle section of the sliding sleeve 5 is provided with a flange ring 11; the bearing seat 4 is provided with a plurality of screw holes that match the flange ring 11; one end of the sliding sleeve 5 passes through the bearing seat 4 and is connected to the top of the bearing seat 4 through the flange ring 11.

[0026] In this embodiment, a flange ring 11 is provided in the middle section of the sliding sleeve 5, and multiple screw holes are provided at the corresponding positions of the bearing seat 4. The sliding sleeve 5 is bolted to the top of the bearing seat 4 through the flange ring 11. Through the surface contact between the flange ring 11 and the bearing seat 4 and the fixation by multiple bolts, the connection rigidity between the sliding sleeve 5 and the bearing seat 4 can be greatly improved, and the sliding sleeve 5 can be prevented from tilting or loosening relative to the bearing seat 4 under the action of stamping impact force. In contrast, the traditional sliding sleeve 5 and the bearing seat 4 are directly inserted, which can easily cause relative displacement due to impact force. Therefore, compared with the traditional technology, this embodiment can "firmly lock" the sliding sleeve 5 on the bearing seat 4, ensuring the stability of the guide reference (i.e., the axis of the sliding sleeve 5), thereby reducing the displacement of the punch 1 caused by the shaking of the sliding sleeve 5.

[0027] Specifically, such as Figure 2 As shown, the end of the sliding sleeve 5 away from the flange ring 11 is located at the adjusting nut 10; the adjusting nut 10 is sleeved on the screw 9 and abuts against the end of the main shaft 2 away from the punch 1; the adjusting nut 10 is connected to the screw 9. The end of the sliding sleeve 5 away from the punch 1 has a flared opening 51 for the adjusting nut 10 to be inserted. The end of the sliding sleeve away from the punch has a flared opening, the adjusting nut is inserted into the flared opening and sleeved on the screw, abutting against the end of the main shaft away from the punch, and is threadedly connected to the screw. In this embodiment, the end of the sliding sleeve 5 away from the punch 1 is provided with a flared end 51. The adjusting nut 10 is inserted into the flared end 51 and sleeved on the screw 9, abutting against the end of the main shaft 2 away from the punch 1, and is threadedly connected to the screw 9. The adjusting nut 10 can be rotated to adjust its relative position with the screw 9, thereby finely adjusting the axial position of the main shaft 2 to ensure the initial alignment accuracy of the punch 1 and the concave template 6 (solving the initial deviation caused by installation or wear). Secondly, after the adjusting nut 10 abuts against the main shaft 2, it eliminates the axial gap between the main shaft 2 and the sliding sleeve 5 and the screw 9, preventing the main shaft 2 from "bouncing" or axially moving due to the gap during stamping. At the same time, the design of the flared end 51 fixes the position of the adjusting nut 10 itself, preventing it from loosening during vibration and ensuring the adjustment accuracy during long-term use.

[0028] Overall workflow: During stamping, the slider 3 drives the shaft seat 4 and the sliding sleeve 5 to rise and fall as a whole. The main shaft 2 moves with the slider 3 under the guidance of the sliding sleeve 5, and the punch 1 stamps the blank on the die plate 6. The high-precision sliding fit between the sliding sleeve 5 and the main shaft 2 and the rigid fixation of the flange ring 11 ensure that the movement trajectory of the punch 1 is a precise axial straight line without lateral sway. The multi-stage locking of the screw 9, the locking ring 7, and the positioning component 8 rigidly binds the relative position of the main shaft 2 and the slider 3, preventing the punch 1 from shifting due to the vibration of the slider 3 transmitted to the main shaft 2. The adjusting nut 10 eliminates the axial clearance and fine-tunes the initial position to ensure the alignment accuracy of the punch 1 with the blank or die plate 6.

[0029] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A limiting device for a billet forming press, comprising a punch (1), characterized in that: It also includes a main shaft (2), a slider (3), a bearing seat (4), a sliding sleeve (5), and a concave template (6); the bearing seat (4) is located at the bottom of the slider (3) and connected to the concave template (6); the sliding sleeve (5) passes through the bearing seat (4) and is connected to the bearing seat (4); the main shaft (2) passes through the sliding sleeve (5) and is slidably connected to the sliding sleeve (5); the punch (1) is located outside the sliding sleeve (5) at the end away from the slider (3).

2. The limiting device for a billet forming press according to claim 1, characterized in that: The slider (3) includes a first opening recess (31) and a second hollow part (32); the second hollow part (32) is provided with a locking ring (7); the main shaft (2) is connected to the sliding sleeve (5) by a screw (9); the end of the screw (9) away from the sliding sleeve (5) passes through the first opening recess (31) and the locking ring (7) in sequence.

3. The limiting device for a billet forming press according to claim 2, characterized in that: The slider (3) also includes a third opening recess (33); the third opening recess (33) is fitted with a positioning component (8); one end of the screw (9) that passes through the locking ring (7) passes into the third opening recess (33) and is connected to the positioning component (8).

4. The limiting device for a billet forming press according to claim 3, characterized in that: The positioning component (8) includes a positioning block (81) and a positioning bolt (82); the positioning block (81) has an axial through hole (811) and a radial opening (812) communicating with the axial through hole; the end of the screw (9) away from the sliding sleeve (5) passes through the axial through hole (811); the positioning bolt (82) passes through the radial opening (812) and abuts against the end of the screw (9) that passes through the axial through hole (811); the positioning bolt (82) is connected to the positioning block (81).

5. The limiting device for a billet forming press according to claim 4, characterized in that: The bottom of the positioning block (81) is provided with an arc-shaped bottom wall that matches the third opening recess (33).

6. The limiting device for a billet forming press according to claim 5, characterized in that: The middle section of the sliding sleeve (5) is provided with a flange ring (11); the bearing seat (4) is provided with a plurality of screw holes that match the flange ring (11); one end of the sliding sleeve (5) passes through the bearing seat (4) and is connected to the top of the bearing seat (4) through the flange ring (11).

7. The limiting device for a billet forming press according to claim 6, characterized in that: The end of the sliding sleeve (5) away from the flange ring (11) is located at the adjusting nut (10); the adjusting nut (10) is sleeved on the screw (9) and abuts against the end of the main shaft (2) away from the punch (1); the adjusting nut (10) is connected to the screw (9).

8. The limiting device for a billet forming press according to claim 7, characterized in that: The end of the sliding sleeve (5) away from the punch (1) is provided with a flared opening (51) for the adjusting nut (10) to be inserted.

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