Emergency mechanical brake device for punch slide

Abstract

The application relates to the technical field of safety protection of mechanical processing equipment, in particular to an emergency mechanical brake device for a punch press sliding block, which comprises a mounting base, a brake assembly and an electromagnetic retaining assembly, wherein the brake assembly comprises a brake wedge block arranged in a slidable mode and a driving spring; the electromagnetic retaining assembly restrains the brake assembly when powered to keep the spring compressed, and releases the restraint to release the brake wedge block when powered off. The application can realize the rapid braking of the punch press sliding block in an emergency such as power failure through a mechanical mode.

Description

Technical Field

[0001] This utility model belongs to the field of safety protection technology for mechanical processing equipment, specifically an emergency mechanical braking device for a punch press slide. Background Technology

[0002] A punch press is a type of mechanical equipment widely used in the field of metal processing. It achieves the stamping and forming of materials through the reciprocating motion of a slide block and has important application value in industrial fields such as automobile manufacturing, home appliance production, and electronic component processing.

[0003] During the operation of a punch press, the motion control of the slide is crucial, especially in emergencies such as sudden power outages or control system failures. It is necessary to ensure that the slide can stop in time to protect the safety of the equipment and the operators. Braking devices are usually used to brake the slide quickly.

[0004] However, most existing braking devices for punch press slides rely on hydraulic or pneumatic systems to drive the braking elements. They achieve the braking effect by applying external force to make the braking element contact the rotating parts and generate frictional resistance. However, when the power source fails or the pressure is insufficient, the reliability of the braking response is limited, which means that the stability of the braking function in emergency conditions needs to be improved. Utility Model Content

[0005] This utility model provides an emergency mechanical braking device for a punch press slide, which solves the technical problem that the existing punch press slide braking device suffers from unstable braking response and insufficient reliability due to reliance on external power in emergency situations such as power failure or power source failure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An emergency mechanical braking device for a punch press slide includes a mounting base, a braking assembly, and an electromagnetic holding assembly, wherein:

[0008] The braking assembly includes a brake wedge and a drive spring. The brake wedge is slidably mounted on a mounting base. The two ends of the drive spring abut against the mounting base and the brake wedge, respectively. The drive spring stores elastic potential energy in a compressed state, which is used to release and push the brake wedge to contact the punch press slide in an emergency, thereby generating braking friction.

[0009] The electromagnetic holding assembly is fixedly mounted on the mounting base. When the electromagnetic holding assembly is energized, it applies a constraint to the braking assembly, keeping the drive spring in a compressed state. When the electromagnetic holding assembly is de-energized, it releases the constraint on the braking assembly.

[0010] Optionally, the mounting base is provided with a guide groove, and the brake wedge is slidably connected to the inner wall of the guide groove; the mounting base is provided with a spring receiving cavity, and the drive spring is housed in the spring receiving cavity.

[0011] Optionally, the electromagnetic holding assembly includes an electromagnet, an armature, and a locking rod fixedly connected to the armature. The electromagnet is fixed on the mounting base, and the armature is movably disposed on one side of the electromagnet. The brake wedge has a locking groove that cooperates with the locking rod. When the electromagnet is energized, it attracts the armature and drives the locking rod to disengage from the locking groove. When the electromagnet is de-energized, the armature, under the action of the return spring, drives the locking rod to insert into the locking groove.

[0012] Optionally, the side of the brake wedge facing the punch press slider is an inclined braking surface, and a wear-resistant friction lining is fixedly connected to the braking surface; a push plate is fixedly connected to the side of the brake wedge away from the braking surface, and one end of the drive spring abuts against the push plate.

[0013] Optionally, the braking assembly further includes an adjusting bolt, which is threaded onto the mounting base and has one end inserted into the spring receiving cavity and abutting against one end of the drive spring. By rotating the adjusting bolt, the initial preload of the drive spring can be adjusted.

[0014] Optionally, the bottom of the mounting base is provided with multiple mounting through holes, the inner wall of which is threadedly connected to the outer wall of the fastening bolt, and the fastening bolt is used to fix the mounting base to the frame of the punch press.

[0015] Optionally, the electromagnetic holding assembly further includes a housing, in which the electromagnet and armature are housed; the housing has a through hole for the locking rod to pass through, and the housing is fixedly connected to the mounting base via a connecting plate.

[0016] This invention provides an emergency mechanical braking device for a punch press slide, which has the following advantages: The braking action of this device does not rely on an external hydraulic or pneumatic power source, but rather utilizes the mechanical energy stored in a pre-compressed drive spring. During normal operation of the punch press, the electromagnetic holding assembly is continuously energized, and the locking rod constrains the braking assembly, which stores a large amount of elastic energy, to a standby position. In the event of an emergency such as a power outage, the electromagnet immediately loses power, and the locking rod automatically engages without magnetic constraint, instantly releasing the braking assembly. The released drive spring pushes the brake wedge block to rapidly squeeze into the movement gap of the punch press slide. Utilizing the increased force generated by the wedge structure and the high friction of the friction lining, a purely mechanical and reliable braking force is applied to the slide until it stops moving. The entire braking process is entirely mechanically spontaneous, with an extremely rapid response, fundamentally eliminating the risk of braking failure due to power source failure, and significantly improving the safety protection level of the equipment in emergency situations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an emergency mechanical braking device for a punch press slide according to the present invention;

[0018] Figure 2 This is a schematic diagram of a rear-view partial assembly structure according to an embodiment of this application;

[0019] Figure 3 This is a schematic cross-sectional view of the mounting base of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Mounting base; 2. Brake wedge; 3. Drive spring; 4. Electromagnet; 5. Armature; 6. Locking rod; 7. Locking groove; 8. Guide groove; 9. Spring receiving cavity; 10. Braking surface; 11. Wear-resistant friction lining; 12. Push plate; 15. Adjusting bolt; 16. Mounting through hole; 17. Housing. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 3 This utility model provides an emergency mechanical braking device for a punch press slide. This device is applied to punch press equipment and performs purely mechanical braking on the punch press slide when the punch press experiences abnormal operating conditions such as power failure or power system failure.

[0023] Please see Figure 1 and Figure 2 This utility model provides an emergency mechanical braking device for a punch press slide, comprising a mounting base 1, a braking assembly mounted on the mounting base 1, and an electromagnetic holding assembly. The mounting base 1 is an integral metal component with a robust structure and sufficient rigidity and strength to withstand the enormous impact force generated during braking. The bottom of the mounting base 1 has multiple mounting through holes 16, each with threads machined into its inner wall. Fastening bolts pass through the mounting through holes 16 and are threadedly connected to the punch press frame or fixed crossbeam, thereby firmly fixing the entire braking device to one side of the punch press slide's movement path.

[0024] Please see Figure 1 , Figure 2 and Figure 3 The mounting base 1 has a through or semi-through guide groove 8 machined on its main body. The guide groove 8 has a rectangular or dovetail cross-section, and its inner wall surface is finely machined with low surface roughness. The mounting base 1 also has a spring receiving cavity 9 inside, which is a cylindrical blind hole with its axis parallel to the extension direction of the guide groove 8.

[0025] The braking assembly includes a brake wedge 2 and a drive spring 3. (See also...) Figure 1 , Figure 2 and Figure 3 The brake wedge 2 is a wedge-shaped metal block whose overall structure slides in conjunction with the inner wall of the guide groove 8. One side of the brake wedge 2 is an inclined brake surface 10, which forms an acute angle with the sliding direction of the brake wedge 2. A wear-resistant friction lining 11 is fixedly connected to the brake surface 10 by bonding or riveting. The wear-resistant friction lining 11 is made of high-hardness, high-friction coefficient alloy material or composite ceramic material, and its working surface is processed with multiple intersecting lines. These intersecting lines increase the friction coefficient during braking contact and help to scrape off oil stains on the contact surface.

[0026] A push plate 12 is fixedly connected to the side of the brake wedge 2 away from the brake surface 10. The push plate 12 is a flat plate structure with a smooth surface, and is integrally formed with the brake wedge 2 or connected by welding. A locking groove 7 is also machined on the side wall of the brake wedge 2. The shape of the locking groove 7 matches the end of the locking rod 6 described later, and its depth and position are precisely calculated.

[0027] The drive spring 3 is a large-diameter, high-stiffness helical compression spring made of high-strength spring steel. The drive spring 3 is housed within the spring receiving cavity 9 of the mounting base 1. One end of the drive spring 3 abuts against the bottom wall of the spring receiving cavity 9, and the other end abuts against the surface of the push plate 12 on the brake wedge 2. When the device is in standby mode, the drive spring 3 is in a highly compressed state, storing a large amount of elastic potential energy.

[0028] To adjust the initial preload of the drive spring 3, the brake assembly also includes an adjusting bolt 15. (See also...) Figure 3 The adjusting bolt 15 is threaded onto the mounting base 1, and its installation position coincides with the axis of the spring receiving cavity 9. One end of the adjusting bolt 15 passes through the interior of the spring receiving cavity 9 and abuts against one end of the drive spring 3. By screwing the adjusting bolt 15 in or out, the initial compression of the drive spring 3 can be changed, thereby precisely setting the magnitude of the thrust released when the brake is triggered.

[0029] The electromagnetic holding assembly is fixedly mounted on the mounting base 1. When the punch press is normally powered on, it applies a continuous constraint to the braking assembly to maintain the compressed and energy-stored state of the drive spring 3. When the punch press is powered off, the constraint is immediately released.

[0030] Please see Figure 1 and Figure 2 The electromagnetic holding assembly includes an electromagnet 4, an armature 5, and a locking rod 6 fixedly connected to the armature 5. The electromagnet 4 is a coil winding structure, which is fixed at a specific position on the mounting base 1. The armature 5 is a ferromagnetic material block that can be attracted by magnetic force, and it is movably disposed on one side of the electromagnet 4. One end of the locking rod 6 is fixedly connected to the armature 5, and the other end extends into the locking groove 7 of the brake wedge 2. The electromagnetic holding assembly also includes a housing 17, in which the electromagnet 4 and the armature 5 are housed. The housing 17 has a through hole for the locking rod 6 to pass through, and the housing 17 is fixedly connected to the mounting base 1 by a connecting plate or bolts.

[0031] During normal operation of the punch press, the control system continuously supplies power to the electromagnet 4, which generates a strong magnetic field that firmly attracts the armature 5 to its surface. In this state, the locking rod 6 connected to the armature 5 is held in a specific position, where the end of the locking rod 6 is precisely engaged in the locking groove 7 of the brake wedge 2. The mechanical engagement between the locking rod 6 and the locking groove 7 prevents the brake wedge 2 from sliding forward under the enormous thrust of the drive spring 3. At this time, the entire braking device is in a standby state, and there is a safe gap between the braking surface 10 of the brake wedge 2 and the punch press slide, which does not affect the normal reciprocating motion of the punch press.

[0032] If the punch press experiences an unexpected power outage, the current supplied to the electromagnet 4 is interrupted momentarily, and the magnetic field it generates disappears. The armature 5, which is attached to the electromagnet 4, loses its magnetic constraint. A return spring (not shown) pushes the armature 5, or the armature 5, under the interaction force between the locking rod 6 and the side wall of the locking groove 7, causes the locking rod 6 to momentarily disengage from the locking groove 7. The constraint on the braking assembly is released.

[0033] After the constraint is released, the elastic potential energy stored in the highly compressed drive spring 3 is released instantaneously, and the drive spring 3 quickly extends, with one end pushing the push plate 12, which in turn pushes the entire brake wedge 2 forward at high speed along the guide groove 8 on the mounting base 1. The inclined braking surface 10 of the brake wedge 2 and its wear-resistant friction lining 11 are forcibly squeezed into the gap between the mounting base 1 and the side wall of the descending punch slide. Due to the wedge structure, the axial thrust applied by the drive spring 3 is amplified into a huge normal force perpendicular to the contact surface. The huge normal force, combined with the high coefficient of friction of the wear-resistant friction lining 11 surface, generates a powerful frictional braking force on the side wall of the punch slide, forcing the punch slide to decelerate rapidly until it comes to a complete stop.

[0034] Please see Figure 2 In order to reset the device after emergency braking, the operator applies force to the brake wedge 2 during reset, returning it to its initial standby position and recompressing the drive spring 3. When the locking groove 7 on the brake wedge 2 aligns with the locking rod 6 again, the electromagnet 4, which is powered back, attracts the armature 5, and the locking rod 6 re-engages the locking groove 7, completing the reset and re-standby process.

[0035] The working process of this utility model's emergency mechanical braking device for a punch press slide is as follows:

[0036] During the initial installation and commissioning phase, the preload of the drive spring 3 is set to the design value by rotating the adjusting bolt 15.

[0037] During normal operation of the punch press, the electromagnet 4 is always energized, and its magnetic force locks the brake wedge 2, which is in the standby position, through the armature 5 and the locking rod 6, while the drive spring 3 is in a compressed and energy-storing state.

[0038] In the event of an emergency such as a power outage, the electromagnet 4 loses power, the magnetic force disappears, the locking rod 6 disengages from the locking groove 7, and the constraint on the brake wedge 2 is released.

[0039] The drive spring 3 releases energy, pushing the brake wedge 2 forward at high speed, wedging into the gap between the punch press slide and the mounting base 1, and braking the slide through friction.

[0040] After troubleshooting, the operator pushed the brake wedge 2 back to its original position. After power was restored, the electromagnet 4 was locked again, and the device returned to standby status.

Claims

1. An emergency mechanical braking device for a punch press slide, characterized in that: Includes mounting base (1), braking assembly and electromagnetic holding assembly, wherein: The braking assembly includes a brake wedge (2) and a drive spring (3). The brake wedge (2) is slidably disposed on the mounting base (1). The two ends of the drive spring (3) abut against the mounting base (1) and the brake wedge (2) respectively. The drive spring (3) is in a compressed state. The electromagnetic holding assembly is fixedly installed on the mounting base (1). When the electromagnetic holding assembly is energized, it applies a constraint to the braking assembly to maintain the compressed state of the drive spring (3). When the electromagnetic holding assembly is de-energized, it releases the constraint on the braking assembly.

2. The emergency mechanical braking device for a punch press slide according to claim 1, characterized in that: The mounting base (1) is provided with a guide groove (8), and the brake wedge (2) is slidably connected to the inner wall of the guide groove (8); the mounting base (1) is provided with a spring receiving cavity (9), and the drive spring (3) is housed in the spring receiving cavity (9).

3. The emergency mechanical braking device for a punch press slide according to claim 1, characterized in that: The electromagnetic holding assembly includes an electromagnet (4), an armature (5), and a locking rod (6) fixedly connected to the armature (5). The electromagnet (4) is fixed on the mounting base (1), and the armature (5) is movably disposed on one side of the electromagnet (4). The brake wedge (2) has a locking groove (7) that cooperates with the locking rod (6). When the electromagnet (4) is energized, the armature (5) is attracted, and the locking rod (6) is inserted into the locking groove (7). When the electromagnet (4) is de-energized, the locking rod (6) disengages from the locking groove (7).

4. The emergency mechanical braking device for a punch press slide according to claim 1, characterized in that: One side of the brake wedge (2) is an inclined brake surface (10), and a wear-resistant friction lining (11) is fixedly connected to the brake surface (10); a push plate (12) is fixedly connected to the side of the brake wedge (2) away from the brake surface (10), and one end of the drive spring (3) abuts against the push plate (12).

5. The emergency mechanical braking device for a punch press slide according to claim 2, characterized in that: The braking assembly also includes an adjusting bolt (15), which is threaded onto the mounting base (1) and one end of which passes through the spring receiving cavity (9) and abuts against one end of the drive spring (3).

6. The emergency mechanical braking device for a punch press slide according to claim 1, characterized in that: The bottom of the mounting base (1) is provided with multiple mounting through holes (16).

7. The emergency mechanical braking device for a punch press slide according to claim 3, characterized in that: The electromagnetic holding assembly also includes a housing (17), in which the electromagnet (4) and the armature (5) are housed; the housing (17) has a through hole through which the locking rod (6) passes.

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