Pickup device of trimming die

Abstract

The invention discloses a piece taking device of a trimming die, which comprises an upper die and a lower die, and is characterized by further comprising a piece taking execution unit, a clamping unit and a releasing unit, the workpiece taking execution unit is arranged on the upper die and comprises two edge cutting tools which are oppositely arranged, edge cutting blades are arranged at the bottoms of the edge cutting tools, and a channel allowing a workpiece to enter is formed between the two edge cutting tools; the clamping unit comprises lateral clamping parts which are arranged on the two edge cutting tools respectively, the clamping ends of the lateral clamping parts can movably stretch into the channel, and the lateral clamping parts are used for clamping the workpiece from the two opposite sides of the workpiece after the workpiece is subjected to edge cutting and enters the channel; the releasing unit is used for acting on the clamping unit at the workpiece taking station so as to release the clamped workpiece. The edge cutting device has the advantages that the channel formed by the edge cutting tool and the lateral clamping part additionally arranged on the channel are utilized, the edge cutting tool is utilized to grab a workpiece while edge cutting is completed, the whole edge cutting, grabbing and lifting process is directly driven by the movement of the upper die, and the efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of post-processing technology for die-cast parts, and in particular to a part-removing device for a trimming mold. Background Technology

[0002] Trimming dies are stamping dies used in the trimming process to give parts a certain height, diameter, and shape. In the die-casting production industry, the formed die-cast blanks often have gates, slag pockets, venting gates, etc., which are usually removed using trimming dies. Currently, after the trimming process, existing trimming dies primarily rely on manual labor or simple tools to remove the product and transfer it to the next station. This method suffers from low production efficiency, high labor intensity, and certain safety hazards for operators during manual removal. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a part removal device for a cutting die that can effectively improve production efficiency, reduce manual operation intensity and ensure safety.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A part-removing device for a trimming die, comprising an upper die and a lower die, and further comprising: The part-removing execution unit is disposed on the upper mold and includes two opposing cutting blades. The bottom of the cutting blades is provided with cutting edges, and a channel for the workpiece to enter is formed between the two cutting blades. The clamping unit includes lateral clamping parts respectively disposed on the two cutting tools and whose clamping ends can be movably extended into the channel, for clamping the workpiece from opposite sides after the workpiece cutting is completed and it enters the channel. A release unit is used to act on the clamping unit at the part removal station to release the clamped workpiece. During the trimming operation, the upper die presses down, causing the part-removing execution unit to press down synchronously. The trimming blade trims the workpiece placed on the lower die, and the trimming is completed at the end of the upper die's downward stroke. At the same time, the workpiece enters the channel, and the clamping unit actuates to clamp the trimmed workpiece from opposite sides. Subsequently, the upper die moves the part-removing execution unit holding the workpiece upward to the part-removing station. The release unit actuates to release the workpiece from the clamping unit.

[0005] The lateral clamping part is an elastic locking pin structure.

[0006] The elastic locking pin structure is a ball-head plunger.

[0007] The release unit includes a pre-compression block that is movably disposed below the upper mold. The pre-compression block is disposed within the channel. At the part removal station, the release unit drives the pre-compression block to move downward, applying a downward release force to the clamped workpiece, thereby freeing the workpiece from the clamping of the lateral clamping part.

[0008] The release unit further includes a drive control module, which is used to lock the pre-compression block at a first fixed position relative to the upper mold at the end of the downward stroke of the upper mold, and maintain this position during the upward movement of the upper mold. At the part removal station, the drive control module releases the position holding of the pre-compression block, allowing the pre-compression block to move to a second position under the action of gravity to perform the release action.

[0009] The drive control module is a solenoid valve. The output end of the solenoid valve acts on a preload plate connected to the preload block. The preload plate is provided with a positioning engagement part for cooperating with the output end of the solenoid valve. The output end of the solenoid valve can mechanically engage or disengage with the positioning engagement part. When engaged, the solenoid valve provides a holding force to overcome the gravity of the preload plate and the preload block, so that the preload block is held in the first position.

[0010] The positioning and fitting part is a recess provided on the pre-pressure plate.

[0011] An upper pressure plate is spaced above the upper mold, and a pre-pressure plate is disposed between the upper pressure plate and the upper mold. An elastic element is disposed between the pre-pressure plate and the upper pressure plate. When the pre-pressure block is held in the first position, there is a movable gap between the lower end face of the pre-pressure plate and the lower end face of the upper mold, and the elastic element is in a compressed and energy-storing state. When the holding is released, the restoring force of the elastic element is superimposed on the gravity of the pre-pressure block and the pre-pressure plate, which together drive the pre-pressure block to press down on the workpiece, so that the workpiece is freed from the clamping of the lateral clamping part.

[0012] It also includes a receiving component that can be moved to the picking station, wherein the receiving component is a receiving tray or a conveyor belt.

[0013] The receiving component is driven by a moving mechanism to move into or out of the picking station.

[0014] The lower mold is provided with a positioning seat for positioning the workpiece.

[0015] Compared with the prior art, the advantages of the present invention are as follows: (1) By utilizing the channel formed by the cutting tool itself and the lateral clamping part installed on it, the cutting tool can be used to grab the workpiece at the same time as the cutting is completed. The entire process of "cutting - grabbing - lifting" is directly driven by the downward and upward movement of the upper mold, which realizes the extreme compactness and seamless connection of the process, effectively improves efficiency, and avoids the safety risks of manual handling. (2) The release of the workpiece is achieved by the release unit integrated in the upper mold, so that the entire part removal device works entirely in the manner of being built into the mold movement, without the need for an additional independent drive source, making the structure of the whole mechanism extremely compact and reliable, and the modification cost is also low. (3) The workpiece is clamped inside the mold and is lifted vertically and smoothly to the static pick-up station with the upper mold, realizing a smooth, non-destructive and highly reliable automatic transfer. Combined with the pick-up station set at a high position and the movable receiving component, it provides convenience for the workpiece to be directly connected to the conveyor line, robot or the next process after the edge cutting is processed, and is easy to be seamlessly integrated into the automated production line. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention when the upper die presses down on the pre-compression block and contacts the workpiece (only the working part is shown). Figure 2 for Figure 1 Enlarged structural diagram at point B; Figure 3 This is a cross-sectional view of the present invention in which the upper mold drives the workpiece-holding lifting unit to the lifting station, the receiving component moves into place, and the solenoid valve is not closed (only the working part structure is shown). Figure 4 for Figure 3 Enlarged structural diagram at point C; Figure 5 for Figure 3 A magnified structural diagram at point D. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] As shown in the figure, a part-removing device for a trimming die includes an upper die 1 and a lower die 2, and further includes: The part-removing execution unit is set on the upper mold 1 and includes two opposite cutting blades 3. The bottom of the cutting blades 3 is provided with cutting edge, and a channel 30 for the workpiece A to enter is formed between the two cutting blades 3. The clamping unit includes lateral clamping parts 4 respectively disposed on the two cutting tools 3 and whose clamping ends can be movably extended into the channel 30, for clamping the workpiece A from opposite sides after the workpiece A has been cut and entered the channel 30. Release unit, the release unit is used to act on the clamping unit at the part picking station to release the clamped workpiece A; During the trimming operation, the upper die 1 presses down, driving the part-removing execution unit to press down synchronously. The trimming blade trims the workpiece A placed on the lower die 2, and the trimming is completed at the end of the upper die 1's downward stroke. At the same time, the workpiece A enters the channel 30, and the clamping unit moves to clamp the trimmed workpiece A from opposite sides. Then, the upper die 1 moves upward, driving the part-removing execution unit holding the workpiece A to the part-removing station. The release unit moves, causing the workpiece A to be released from the clamping unit.

[0019] In this specific embodiment, the lateral clamping part 4 is an elastic locking pin structure, specifically a ball-head plunger. The ball-head plunger is an integrated design, providing elastic clamping without damaging workpiece A, with controllable force, reliable durability, and easy maintenance.

[0020] The specific combination of the ball plunger and the cutting tool 3 is as follows: A blind mounting hole is precisely machined vertically on the inner wall of each cutting tool 3 (i.e., the side facing the channel 30). The mounting portion 41 of the ball plunger is reliably fixed in this blind mounting hole. Under the preload of the internal spring, the spherical head of the ball plunger can movably protrude from the inner wall surface of the cutting tool 3 and extend into the channel 30. The ball plungers on the two cutting tools 3 are symmetrically arranged in the height direction. Their installation height needs to be precisely calculated to ensure that when workpiece A completes the cutting and is pushed into the channel 30 to the designed position, the side wall of workpiece A is exactly at the corresponding height of the two ball plungers. Preferably, a set of ball plungers can be set above and below the clamping area of ​​workpiece A to form at least two-point clamping to enhance stability and prevent workpiece A from tilting or shaking during lifting.

[0021] The core of ball plunger selection lies in its spring ejection force (i.e., clamping force). The selection of this ejection force must follow the following design principles: it must be greater than the sum of the tangential component of the gravity of a single workpiece A on the ball contact surface and the possible inertial force during vertical lifting, to ensure that workpiece A will not slip due to its own weight during the lifting acceleration phase; at the same time, it must be less than the critical sliding friction force generated by the normal component of the maximum downward pressure that the release unit (pre-pressure block 5) can provide when it is in action.

[0022] In this specific embodiment, the release unit includes a pre-pressure block 5 that is movably disposed below the upper mold 1. The pre-pressure block 5 is located within the channel 30. At the part-removal station, the release unit drives the pre-pressure block 5 to move downward, applying a downward release force to the clamped workpiece A, causing workpiece A to break free from the gripping of the lateral clamping part 4. By applying precise downward pressure to the upper surface of workpiece A at the part-removal station through the pre-pressure block 5, the direction of which is consistent with the direction of gravity of workpiece A, effectively overcoming the lateral friction force generated by the ball plunger, achieving controllable and non-destructive forced demolding, and ensuring a high success rate of part removal.

[0023] In this specific embodiment, the release unit further includes a drive control module 6. The drive control module 6 is used to lock the pre-pressing block 5 at a first position relatively fixed to the upper mold 1 at the end of the downward pressing stroke of the upper mold 1, and maintain this position during the upward movement of the upper mold 1. At the part removal station, the drive control module 6 releases the position holding of the pre-pressing block 5, so that the pre-pressing block 5 moves to a second position under the action of gravity to perform the release action.

[0024] In this specific embodiment, the drive control module 6 is a solenoid valve. The output end 61 of the solenoid valve acts on the pre-pressure plate 7 connected to the pre-pressure block 5. The pre-pressure plate 7 is provided with a positioning mating part 71 for cooperating with the output end 61 of the solenoid valve. The output end 61 of the solenoid valve can mechanically engage or disengage with the positioning mating part 71. When engaged, the solenoid valve provides a holding force to overcome the gravity of the pre-pressure plate 7 and the pre-pressure block 5, so that the pre-pressure block 5 is held in the first position.

[0025] In this specific embodiment, the positioning and fitting part 71 is a recess provided on the pre-pressure plate 7.

[0026] In this specific embodiment, an upper pressure plate 8 is spaced above the upper mold 1, and a pre-pressure plate 7 is disposed between the upper pressure plate 8 and the upper mold 1. An elastic element 81 is disposed between the pre-pressure plate 7 and the upper pressure plate 8. When the pre-pressure block 5 is held in the first position, there is a movable gap between the lower end face of the pre-pressure plate 7 and the lower end face of the upper mold 1, and the elastic element 81 is in a compressed and stored energy state. When the holding is released, the restoring force of the elastic element 81 is superimposed on the gravity of the pre-pressure block 5 and the pre-pressure plate 7, jointly driving the pre-pressure block 5 to press down on the workpiece A, so that the workpiece A is freed from the clamping of the lateral clamping part 4. The superposition of the spring preload and gravity forms a safety factor of 1.5-2 times, ensuring that even in the extreme case where the clamping force increases due to wear of the ball plunger, the release action can still be reliably completed.

[0027] In this specific embodiment, the elastic element 81 is a spring.

[0028] In this specific embodiment, the specific structure of the release unit and its drive control module 6 is as follows: An upper pressure plate 8 is provided at intervals above the upper mold 1. A horizontally arranged pre-pressure plate 7 is located between the upper pressure plate 8 and the upper mold 1, and is vertically fixed to the pre-pressure block 5 provided in the channel 30 through a connecting rod 73. The lower surface of the pre-pressure block 5 matches the contour of the upper surface of the workpiece A. A spring is provided between the pre-pressure plate 7 and the upper pressure plate 8. The drive control module 6 employs a opposed solenoid valve layout. Two solenoid valves are fixedly mounted on the upper mold 1. The output end 61 of the solenoid valve is an axially extendable piston rod, the end of which is machined into an arc shape. Preload plate fixing blocks 70 are fixed at corresponding positions on both sides of the preload plate 7. Each preload fixing block has a recess precisely machined on the side facing the solenoid valve. This recess matches the shape of the piston rod end, forming a positioning mating part 71. The recess and the piston rod end form a three-dimensional constraint, providing better torsional resistance than planar contact. The depth of the recess is calculated to ensure reliable engagement even under maximum acceleration. The opposed solenoid valve layout generates a balanced clamping force.

[0029] In this specific embodiment, a receiving component 9, which can be moved to the part-receiving station, is also included. The receiving component 9 is a receiving tray or a conveyor belt. It is used to effectively receive the workpiece A that has been released and dropped, and facilitates its transfer to the next process. It can be integrated into an automated production line.

[0030] In this specific embodiment, the receiving component 9 is driven by a moving mechanism (not shown in the figure) to move into or out of the picking station. The moving mechanism can be a linear module driven by a servo motor, used to precisely control the dwell time of the receiving component 9 at the picking station, so as to match the production cycle.

[0031] In this specific embodiment, the lower mold 2 is provided with a positioning seat 22 for positioning workpiece A, thereby achieving stable positioning of workpiece A.

[0032] The overall workflow is as follows: I. Preparation and Positioning: (1) Place the workpiece A to be processed on the positioning seat 22 of the lower mold 2 to ensure accurate positioning; (2) The upper mold 1 component is in the initial high position, and the pre-pressing block 5 hangs down naturally under the action of gravity. At this time, the pre-pressing fixing block 70 rests on the upper end face of the upper mold 1. (3) The receiving component 9 (receiving tray / conveyor belt) is in the standby position and has not entered the picking station; II. Upper mold pressing, pre-pressing, locking and trimming: (4) The upper die 1 begins its continuous downward pressing stroke; (5) During the stroke, the lower end of the pre-pressing block 5 first contacts the upper surface of the workpiece A and stops moving downward due to the support of the workpiece A. At this time, the pre-pressing block 5 and the pre-pressing plate 7 remain stationary relative to the upper mold 1. (6) The upper mold 1 continues to press down, driving the cutting tool 3 and the solenoid valve to continue to move downward, while the pre-pressing block 5 and the pre-pressing plate 7 remain at the current height position due to the support of workpiece A; (7) As the upper mold 1 continues to descend, the piston rod end of the solenoid valve gradually aligns with and eventually enters the recess of the preload plate fixing block 70; (8) When the upper die 1 reaches the end of its final downward stroke, the following actions are performed simultaneously: ①The cutting tool 3 completes the final cutting; ② Workpiece A is completely pushed into the channel 30 between the two cutting tools 3; ③ After the spherical head of the ball plunger is squeezed by the side wall of workpiece A, it forms an elastic clamping force on workpiece A under the action of the spring. ④ The control system triggers the solenoid valve to be energized, the piston rod extends and forms a mechanical engagement with the recess, locking the pre-press plate 7 and the pre-press block 5 in the current position (first position). At this time, an active gap is formed between the lower end face of the pre-press plate 7 and the upper end face of the upper mold 1, and the spring between the pre-press plate 7 and the upper pressure plate 8 is compressed and stored. III. Ascending Transfer: (9) The upper mold 1 begins to rise as a whole, which drives the cutting tool 3 holding the workpiece A, as well as the pre-pressure plate 7 and pre-pressure block 5 locked by the solenoid valve to rise synchronously. (10) The upper mold 1 rises to the preset part-removal station; IV. Release and Retrieval: (14) At the pick-up station, the moving mechanism drives the receiving component 9 to move accurately to directly below workpiece A; (15) The control system de-energizes the solenoid valve, causing the piston rod to retract and disengage the mechanical engagement; (16) The pre-press plate 7 and the pre-press block 5 are pressed down rapidly under the action of their own weight and the restoring force released by the spring, which drives the lower end face of the pre-press block 5 to press forcefully on the upper surface of the workpiece, applying a downward release force. This release force is greater than the clamping friction of the ball plunger, forcing the workpiece A to disengage from the clamp. (17) Workpiece A falls freely into receiving part 9, completing the part removal.

Claims

1. A part-removing device for a trimming die, comprising an upper die and a lower die, characterized in that, Also includes: The part-removing execution unit is disposed on the upper mold and includes two opposing cutting blades. The bottom of the cutting blades is provided with cutting edges, and a channel for the workpiece to enter is formed between the two cutting blades. The clamping unit includes lateral clamping parts respectively disposed on the two cutting tools and whose clamping ends can be movably extended into the channel, for clamping the workpiece from opposite sides after the workpiece cutting is completed and it enters the channel. A release unit is used to act on the clamping unit at the part removal station to release the clamped workpiece. During the trimming operation, the upper die presses down, causing the part-removing execution unit to press down synchronously. The trimming blade trims the workpiece placed on the lower die, and the trimming is completed at the end of the upper die's downward stroke. At the same time, the workpiece enters the channel, and the clamping unit actuates to clamp the trimmed workpiece from opposite sides. Subsequently, the upper die moves the part-removing execution unit holding the workpiece upward to the part-removing station. The release unit actuates to release the workpiece from the clamping unit.

2. The part-removing device for a trimming mold as described in claim 1, characterized in that... The lateral clamping part is an elastic locking pin structure.

3. The part-removing device for a trimming mold as described in claim 1, characterized in that... The release unit includes a pre-compression block that is movably disposed below the upper mold. The pre-compression block is disposed within the channel. At the part removal station, the release unit drives the pre-compression block to move downward, applying a downward release force to the clamped workpiece, thereby freeing the workpiece from the clamping of the lateral clamping part.

4. The part-removing device for a trimming die as described in claim 3, characterized in that... The release unit further includes a drive control module, which is used to lock the pre-compression block at a first fixed position relative to the upper mold at the end of the downward stroke of the upper mold, and maintain this position during the upward movement of the upper mold. At the part removal station, the drive control module releases the position holding of the pre-compression block, allowing the pre-compression block to move to a second position under the action of gravity to perform the release action.

5. The part-removing device for a trimming die as described in claim 4, characterized in that... The drive control module is a solenoid valve. The output end of the solenoid valve acts on a preload plate connected to the preload block. The preload plate is provided with a positioning engagement part for cooperating with the output end of the solenoid valve. The output end of the solenoid valve can mechanically engage or disengage with the positioning engagement part. When engaged, the solenoid valve provides a holding force to overcome the gravity of the preload plate and the preload block, so that the preload block is held in the first position.

6. The part-removing device for a trimming mold as described in claim 5, characterized in that... An upper pressure plate is spaced above the upper mold, and a pre-pressure plate is disposed between the upper pressure plate and the upper mold. An elastic element is disposed between the pre-pressure plate and the upper pressure plate. When the pre-pressure block is held in the first position, there is a movable gap between the lower end face of the pre-pressure plate and the lower end face of the upper mold, and the elastic element is in a compressed and energy-storing state. When the holding is released, the restoring force of the elastic element is superimposed on the gravity of the pre-pressure block and the pre-pressure plate, which together drive the pre-pressure block to press down on the workpiece, so that the workpiece is freed from the clamping of the lateral clamping part.

7. The part-removing device for a trimming die as described in claim 1, characterized in that... It also includes a receiving component that can be moved to the picking station, wherein the receiving component is a receiving tray or a conveyor belt.

8. The part-removing device for a trimming die as described in claim 7, characterized in that... The receiving component is driven by a moving mechanism to move into or out of the picking station.

9. The part-removing device for a trimming mold as described in claim 1, characterized in that... The lower mold is provided with a positioning seat for positioning the workpiece.

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