Friction press

Abstract

The invention discloses a friction press, and relates to the technical field of friction presses, the friction press comprises a rack, a flywheel and a pressure hammer, two friction wheels are oppositely arranged on the rack, and the flywheel drives the pressure hammer to vertically reciprocate through a rotating mechanism. When the arc-shaped piece abuts against a friction wheel, the friction wheel drives the arc-shaped piece to instantly rotate in an accelerated mode in the circumferential direction of the wheel body and passively extrudes the elastic reset mechanism, so that the elastic reset mechanism deforms after being extruded till no deformation occurs. The arc-shaped piece is driven by the friction wheel in a passive mode to drive the wheel body to rotate, synchronous rotation between the wheel body and the friction wheel is achieved, acceleration exerted on the arc-shaped piece when the friction wheel rotates at a high speed is buffered, and the situation that the wheel body is abraded in the circumferential direction due to the fact that the acceleration is too high is avoided; in addition, relative sliding generated in the acceleration process is reduced, and abrasion of the wheel body is prevented from being increased.

Description

Technical Field

[0001] The invention relates to the technical field of friction presses, in particular to a friction press. Background Art

[0002] As is known, a friction press is a screw press that uses friction drive, also known as a double-disc friction press, which includes a motor, a friction disc, a flywheel, a screw, a pressure hammer and other components. The motor drives two coaxial friction discs that can make axial reciprocating movements to rotate and alternately contact the flywheel, causing the flywheel to rotate forward and backward, driving the pressure hammer to passively reciprocate up and down to complete the forging operation.

[0003] For example, the Chinese patent document with publication number CN117103747A, publication date 2023-11-24, and titled "A Friction Press" includes a support plate, a support column, a motor, a first friction disc, a flywheel, a first screw, a threaded sleeve, a forging hammer and a forging seat. The support column is symmetrically fixed on the lower surface of the support plate, and the first fixed plate and the second fixed plate are fixed on both sides of the upper surface of the support plate. The first fixed plate and the second fixed plate are both rotatably provided with a first rotating shaft on the opposite side, and the opposite ends of the two first rotating shafts are fixedly connected to the first friction disc. The motor is fixedly installed on the side of the first fixed plate, and the output end of the motor is fixedly connected to one end of the first rotating shaft. The first screw is vertically rotatably arranged in the middle of the support plate, and the lower end of the first screw is threadedly connected to the threaded sleeve. In this way, the contact area between the friction disc and the flywheel is increased, and the friction disc and the flywheel are prevented from slipping. At the same time, the forging hammer can be disassembled and replaced for use, thereby improving the processing efficiency.

[0004] In the prior art, at the moment when the friction disc contacts the flywheel, the high-speed rotating friction disc drives the flywheel from stationary to rotating. During this process, since the surfaces of the two are in direct contact, the friction disc rotates at a constant speed, and the flywheel accelerates from stationary to synchronously rotating with the friction wheel in a very short time. The acceleration process is too fast. At the same time, due to the speed difference, the friction disc and the flywheel undergo a large relative sliding during the acceleration process of the flywheel, which increases the wear of the two. Summary of the invention

[0005] The purpose of the present invention is to provide a friction press to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a friction press, comprising a frame, a flywheel and a pressure hammer, wherein two friction wheels are relatively arranged on the frame, and the flywheel drives the pressure hammer to reciprocate vertically through a rotating mechanism. The flywheel comprises a wheel body and a plurality of arc-shaped parts movably arranged on the circumferential side of the wheel body, each of the arc-shaped parts can move in the circumferential direction of the wheel body, and an elastic reset mechanism is also connected between the arc-shaped parts and the wheel body, and the arc-shaped parts are driven by the friction wheel to drive the wheel body to rotate.

[0007] In the above-mentioned friction press, the elastic reset mechanism includes a plurality of fan-shaped grooves opened on the circumference of the wheel body, and a sliding block is slidably connected in the fan-shaped groove, each of the sliding blocks is fixedly connected to each of the arc-shaped members in a one-to-one correspondence, and a limit spring is fixedly connected to each of the opposite sides of the sliding block, and one end of the two limit springs is respectively fixedly connected to the two side walls of the fan-shaped groove.

[0008] In the above-mentioned friction press, the number of the arc-shaped members is four, and the four arc-shaped members are distributed in an annular shape on the circumference of the wheel body, and the four arc-shaped members form a circular ring shape in terms of position distribution to slide against the friction wheel.

[0009] In the above-mentioned friction press, there is line contact sliding between the four arc-shaped members and the friction wheel.

[0010] In the above-mentioned friction press, the sliding block is adapted to the fan-shaped groove.

[0011] In the above-mentioned friction press, the arc-shaped member includes a first arc-dividing member and a second arc-dividing member, wherein the first arc-dividing member and the second arc-dividing member are arranged side by side in the axial direction of the wheel body.

[0012] The above-mentioned friction press has a groove on the sliding block, a fixed frame is fixedly connected in the groove, a displacement block is slidably connected inside the fixed frame, and a push rod is rotatably connected to each of the opposite sides of the displacement block, and each push rod is rotatably connected to a moving block, and the moving block is vertically slidably connected to the inside of the groove.

[0013] In the above-mentioned friction press, one of the moving blocks is fixedly connected to the first arc-dividing member, and the other moving block is fixedly connected to the second arc-dividing member.

[0014] In the above-mentioned friction press, a compression spring is connected between the displacement block and the inner wall of the groove.

[0015] In the above-mentioned friction press, when the compression spring is in an initial state, there is a certain interval between the first arc-dividing member and the second arc-dividing member.

[0016] In the above technical scheme, the present invention provides a friction press. When the arc-shaped member (stationary state) abuts against a friction wheel (high-speed rotation state), the friction wheel drives the arc-shaped member to instantly accelerate the rotation in the circumference of the wheel body, and passively squeezes the elastic reset mechanism, so that the elastic reset mechanism is deformed after being squeezed until it no longer deforms. In this way, the arc-shaped member passively accepts the drive of the friction wheel to drive the wheel body to rotate, thereby realizing synchronous rotation between the wheel body and the friction wheel. In the above process, not only the acceleration applied to the arc-shaped member when the friction wheel rotates at high speed is buffered to avoid excessive acceleration to cause certain wear on the circumference of the wheel body, but also the relative sliding during the acceleration process is reduced to avoid increased wear on the wheel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 A structural schematic diagram of a friction press provided by an embodiment of the present invention;

[0019] Figure 2 A schematic cross-sectional view of a flywheel in a friction press provided by an embodiment of the present invention;

[0020] Figure 3 A structural schematic diagram of another embodiment of a friction press provided by an embodiment of the present invention;

[0021] Figure 4 for Figure 3 Schematic diagram of the internal structure of the middle wheel body;

[0022] Figure 5 for Figure 4 A local enlarged schematic diagram of the middle A;

[0023] Figure 6 Schematic diagram of the motion trajectory between the wheel body and the friction wheel.

[0024] Description of reference numerals:

[0025] 1. Frame; 2. Flywheel; 3. Pressure hammer; 4. Friction wheel; 5. Wheel body; 6. Arc-shaped part; 7. Fan-shaped groove; 8. Sliding block; 9. Limit spring; 10. First arc-dividing part; 11. Second arc-dividing part; 12. Groove; 13. Fixed frame; 14. Displacement block; 15. Push rod; 16. Moving block; 17. Compression spring. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1-6 As shown, a friction press provided by an embodiment of the present invention includes a frame 1, a flywheel 2 and a pressure hammer 3, wherein two friction wheels 4 are arranged on the frame 1, and a rotating mechanism for driving the pressure hammer 3 to move is arranged on the flywheel 2, and the flywheel 2 includes a wheel body 5 and a plurality of arc-shaped parts 6 movably arranged on the peripheral side of the wheel body 5, each of the arc-shaped parts 6 can move in the circumferential direction of the wheel body 5, and an elastic reset mechanism is also connected between the arc-shaped parts 6 and the wheel body 5, and the arc-shaped parts 6 are driven by the friction wheel 4 to drive the wheel body 5 to rotate.

[0028] Specifically, the frame 1 is a frame-type structure, and the frame 1 is fixed on a fixed foundation such as the ground. A pressure hammer 3 for applying pressure is arranged on the frame 1, and the working direction of the pressure hammer 3 is arranged vertically downward. Two friction wheels 4 are also arranged relatively on the frame 1, and the two friction wheels 4 are driven by a driving mechanism to rotate synchronously. The driving mechanism preferably includes a motor and a rotating shaft. The motor is arranged on the frame 1, and the motor output shaft is coaxially connected with the rotating shaft to realize transmission. The two friction wheels 4 are fixedly connected to both ends of the rotating shaft. Specifically, a slide groove (not shown in the figure) is opened on the motor output shaft, and a protrusion (not shown in the figure) is arranged in the rotating shaft. The protrusion is slidably adapted to the slide groove to realize the transmission that the rotating shaft and the motor output shaft can slide axially and rotate at the same time, that is, the rotating shaft can rotate following the output shaft of the motor, but at the same time can slide axially relative to the output shaft. In this embodiment, the motor is started to drive the rotating shaft to rotate, and the two friction wheels 4 are also driven to rotate synchronously. A pushing mechanism is provided on the driving mechanism, and the pushing mechanism is used to push the rotating shaft to axially reciprocate to synchronously drive the two friction wheels 4 to change the abutment position between the two friction wheels 4 and the flywheel 2, that is, a friction wheel 4 is abutted against the flywheel 2. The pushing mechanism preferably includes a sliding wheel and a toggle rod. The sliding wheel is fixedly connected to the rotating shaft, and the toggle rod is rotatably connected to the frame 1 through a bracket. When changing the abutment position between the two friction wheels 4 and the flywheel 2, the rotating shaft is caused to slide on the motor output shaft by pushing the toggle rod, and the rotating shaft The two friction wheels 4 on the flywheel 2 are in turn in contact with the flywheel 2 to realize the forward and reverse rotation of the flywheel 2. The flywheel 2 is provided with a rotating mechanism for driving the pressure hammer 3 to move. The rotating mechanism preferably includes a threaded column, which is threadedly connected to the frame 1, and the threaded column is rotatably connected to the pressure hammer 3. The pressure hammer 3 is slidably connected in the frame 1. In this embodiment, the rotation of the friction wheel 4 is used to drive the flywheel 2 to rotate and slide in the vertical direction, thereby driving the threaded column to rotate as well, thereby providing a force for the pressure hammer 3 to slide inside the frame 1, ensuring that the pressure hammer 3 can perform pressure processing on the workpiece normally. The above are all existing technologies and will not be repeated.One of the innovations of this embodiment is that the flywheel 2 includes a wheel body 5 and a plurality of arc-shaped members 6 movably arranged on the circumferential side of the wheel body 5. In this embodiment, the number of the arc-shaped members 6 is preferably four, wherein the four arc-shaped members 6 are annularly distributed on the circumference of the wheel body 5, and the four arc-shaped members 6 form a circular ring shape in terms of position distribution. During the transmission process, the arc-shaped member 6 and the friction wheel 4 are in line contact and sliding. In this way, the two friction wheels 4 are driven to rotate synchronously through the operation of the motor. Each of the arc-shaped members 6 can move in the circumferential direction of the wheel body 5, and the arc-shaped member 6 and the friction wheel 4 are in line contact and sliding. At the same time, an elastic reset mechanism is also connected between the arc-shaped member 6 and the wheel body 5, and the arc-shaped member 6 is driven by the friction wheel 4 to drive the wheel body 5 to rotate. In this embodiment, when processing the workpiece (the first step), the motor is started to drive the rotating shaft to rotate, so that the two friction wheels 4 rotate synchronously on the frame 1, and then the toggle lever is pushed to push the sliding wheel so that one of the friction wheels 4 approaches and abuts against the arc-shaped member 6 on the peripheral side of the flywheel 2. In this way, the arc-shaped member 6 revolves on the wheel body 5 through the rotation of the friction wheel 4. In the initial stage of the movement of the arc-shaped member 6, since it and the wheel body 5 have an elastic reset mechanism, the wheel body 5 does not immediately revolve synchronously with the arc-shaped member 6. That is, in the initial stage, the arc-shaped member 6 slides circumferentially on the wheel body 5 and applies pressure to the elastic reset mechanism. When the elastic reset mechanism is squeezed to the limit, the arc-shaped member 6 rotates synchronously with the wheel body 5, so that the arc-shaped member 6 is driven by the friction wheel 4 to drive the wheel body 5 to rotate as a whole, thereby driving the rotating machine. The mechanism rotates on the frame 1 to push the pressure hammer 3 to slide in the frame 1 to perform pressure processing on the workpiece placed on the processing table of the frame 1; after the workpiece is processed (the second step), the toggle lever is pushed again to push the sliding wheel to make the other friction wheel 4 approach and abut against the arc-shaped member 6 on the peripheral side of the flywheel 2 (that is, separate from one friction wheel 4). In this way, through the rotation of the friction wheel 4, the movement of the first step above is repeated, except that the rotation direction of the wheel body 5 is opposite, so that the arc-shaped member 6 first slides relative to the wheel body 5 and applies pressure to the elastic reset mechanism, and then the arc-shaped member 6 is driven by the friction wheel 4 to drive the wheel body 5 to rotate as a whole, thereby driving the threaded column to rotate on the frame 1 to push the pressure hammer 3 to slide in the frame 1, so that the pressure hammer 3 is away from the workpiece on the processing table, which is convenient for taking or replacing the processed workpiece.

[0029] The beneficial effects of this embodiment are as follows: when the arc-shaped member 6 (stationary state) abuts against a friction wheel 4 (high-speed rotating state), the friction wheel 4 drives the arc-shaped member 6 to instantly accelerate its rotation in the circumferential direction of the wheel body 5, and passively squeezes the elastic reset mechanism, causing the elastic reset mechanism to deform after being squeezed until it no longer deforms. In this way, the arc-shaped member 6 passively accepts the drive of the friction wheel 4 to drive the wheel body 5 to rotate, thereby realizing synchronous rotation between the wheel body 5 and the friction wheel 4. In the above process, not only the acceleration applied to the arc-shaped member 6 when the friction wheel 4 rotates at high speed is buffered to avoid excessive acceleration to cause certain wear on the circumference of the wheel body 5, but also the relative sliding during the acceleration process is reduced to avoid increased wear on the wheel body 5.

[0030] In another embodiment provided by the present invention, please refer to Figure 2 The elastic reset mechanism preferably includes a plurality of fan-shaped grooves 7 provided on the circumference of the wheel body 5, and a sliding block 8 is slidably connected in the fan-shaped groove 7, that is, the sliding block 8 is adapted to the fan-shaped groove 7. In this embodiment, the fan-shaped grooves 7 are preferably four, and the fan-shaped grooves 7 provide a space for the sliding block 8 to slide on the arc-shaped member 6, that is, the stability of the sliding of the arc-shaped member 6 is improved. Each of the sliding blocks 8 is fixedly connected to each of the arc-shaped members 6 in a one-to-one correspondence, so as to realize the sliding connection between the arc-shaped member 6 and the wheel body 5. A limit spring 9 is fixedly connected to the opposite sides of the sliding block 8, and one end of the two limit springs 9 is respectively fixedly connected to the two side walls of the fan-shaped groove 7. Specifically, in the first step, when the arc-shaped member 6 (stationary state) abuts against a friction wheel 4 (high-speed rotating state), the friction wheel 4 drives the arc-shaped member 6 to accelerate instantaneously in the circumferential direction of the wheel body 5, and performs passive pressure deformation on the limit spring 9 in the fan-shaped groove 7, so that the limit spring 9 is deformed; in the second step, when a certain deformation is reached, the limit spring 9 no longer deforms, so that the arc-shaped member 6 is driven by the friction wheel 4 to drive the wheel body 5 to rotate synchronously, so as to realize the synchronous rotation between the wheel body 5 and the friction wheel 4. In this process, not only the acceleration applied by the friction wheel 4 to the arc-shaped member 6 is buffered to avoid excessive acceleration causing certain wear on the circumference of the wheel body 5, but also the relative sliding occurring during the acceleration process is reduced to avoid increasing the wear on the wheel body 5; in the third step, when the arc-shaped member 6 on the wheel body 5 loses the abutment with the friction wheel 4, the wheel body 5 no longer rotates, and the limit spring 9 is reset after losing the pressure.

[0031] In another embodiment provided by the present invention, please refer to Figure 6As shown in FIG. 1 , in an ideal state, the contact line between the wheel body 5 and the friction wheel 4 is a straight line A, that is, a vertical diameter line on the friction wheel 4, and the circumferential force generated by the straight line A is just a horizontal force to completely drive the wheel body 5 to rotate. However, in reality, due to manufacturing errors, assembly errors, vibrations, and long-term wear of the wheel body 5 and the friction wheel 4, the contact line between the wheel body 5 and the friction wheel 4 is often Figure 6 The straight line B in the diagram is a non-vertical diameter line. At this time, the circumferential force generated by the friction wheel 4 on the wheel body 5 is divided into two directions of force. One direction is the axial force that drives the wheel body 5 and the friction wheel 4 to rotate synchronously, and the other direction is the oblique force. This force prevents the synchronous rotation between the wheel body 5 and the friction wheel 4, which will cause the overall transmission efficiency of the equipment to decrease. Therefore, it is necessary to buffer the oblique force.

[0032] The present embodiment makes further improvements to the arc-shaped member 6, and sets it as a split structure. Specifically, the arc-shaped member 6 includes a first arc-dividing member 10 and a second arc-dividing member 11, that is, the arc-shaped member 6 has two arcs, and the first arc-dividing member 10 and the second arc-dividing member 11 are arranged side by side in the axial direction of the wheel body 5, and the radial dimension of the first arc-dividing member 10 is greater than the radial dimension of the second arc-dividing member 11. In this way, when the wheel body 5 rotates, the first arc-dividing member 10 abuts against the friction wheel 4 to drive the wheel body 5 to rotate passively, while the second arc-dividing member 11 does not contact the friction wheel 4. In the present embodiment, a groove 12 is provided on the sliding block 8, and the groove 12 is provided on the sliding block 8. A fixed frame 13 is fixedly connected in the groove 12, and a displacement block 14 is horizontally slidably connected inside the fixed frame 13. A push rod 15 is rotatably connected to each of the opposite sides of the displacement block 14. The two push rods 15 are symmetrically and inclinedly arranged. A moving block 16 is rotatably connected to each of the push rods 15. The moving block 16 is vertically slidably connected to the inside of the groove 12, one of the moving blocks 16 is fixedly connected to the first arc-dividing piece 10, and the other moving block 16 is fixedly connected to the second arc-dividing piece 11. A compression spring 17 is connected between the displacement block 14 and the inner wall of the groove 12. In the initial state, there is a certain interval between the first arc-dividing piece 10 and the second arc-dividing piece 11.

[0033] Specifically, when the first arc-dividing member 10 (stationary state) abuts against the friction wheel 4 (high-speed rotation state), the friction wheel 4 drives the first arc-dividing member 10 to synchronously accelerate and rotate in the circumferential direction of the wheel body 5, so that the limit spring 9 in the fan-shaped groove 7 is passively squeezed to deform; when a certain deformation is reached, the limit spring 9 no longer deforms, so that the first arc-dividing member 10 accepts the drive of the friction wheel 4 to drive the wheel body 5 to rotate, so as to achieve synchronous rotation between the wheel body 5 and the friction wheel 4; when the wheel body 5 and the friction wheel 4 rotate synchronously, the wheel body 5 generates an oblique force due to the above-mentioned reasons, so that the first arc-dividing member 10 will be driven to move vertically upward or downward in the axial direction of the wheel body 5, so that the first arc-dividing member 10 drives the corresponding moving block 16 to move vertically, and the vertical motion belt of the vertical motion of the moving block 16 The corresponding push rod 15 swings passively, and the push rod 15 makes the displacement block 14 slide horizontally inside the fixed frame 13 to convert the vertical force component into a circumferential force, and squeeze the compression spring 17 to deform. At this time, the push rods 15 above and below the displacement block 14 swing passively, thereby buffering the oblique force generated on the wheel body 5; at the same time, due to the horizontal sliding of the displacement block 14, the push rod 15 connected to the second arc dividing member 11 will also be driven to tilt and swing, thereby causing the second arc dividing member 11 to passively move downward. Due to the oblique force generated during the rotation of the wheel body 5, the second arc dividing member 11 will also tend to move in the opposite direction as a whole. Therefore, through the passive swing of the second arc dividing member 11, the generated oblique force is buffered again to reduce the extent of the decrease in the overall transmission efficiency of the equipment.

[0034] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A friction press, comprising a frame, a flywheel and a pressure hammer, wherein two friction wheels are arranged opposite to each other on the frame, and the flywheel drives the pressure hammer to reciprocate vertically through a rotating mechanism, characterized in that: The flywheel includes a wheel body and a plurality of arc-shaped parts movably arranged on the circumferential side of the wheel body. Each of the arc-shaped parts can move in the circumferential direction of the wheel body. An elastic reset mechanism is also connected between the arc-shaped parts and the wheel body. The arc-shaped parts are driven by the friction wheel to drive the wheel body to rotate.

2. A friction press according to claim 1, characterized in that: The elastic reset mechanism includes a plurality of fan-shaped grooves opened on the circumference of the wheel body, and a sliding block is slidably connected in the fan-shaped groove, each sliding block is fixedly connected to each arc-shaped member in a one-to-one correspondence, and a limit spring is fixedly connected to each of the opposite sides of the sliding block, and one end of the two limit springs is respectively fixedly connected to the two side walls of the fan-shaped groove.

3. A friction press according to claim 2, characterized in that: The number of the arc-shaped members is four, and the four arc-shaped members are distributed in an annular shape on the circumference of the wheel body, and the four arc-shaped members form a circular ring shape in terms of position distribution to slide against the friction wheel.

4. A friction press according to claim 3, characterized in that: There is line contact sliding between the four arc-shaped members and the friction wheel.

5. A friction press according to claim 2, characterized in that: The sliding block is matched with the fan-shaped groove.

6. A friction press according to claim 1, characterized in that: The arc-shaped member includes a first arc-dividing member and a second arc-dividing member, and the first arc-dividing member and the second arc-dividing member are arranged side by side in the axial direction of the wheel body.

7. A friction press according to claim 2, characterized in that: The sliding block is provided with a groove, a fixed frame is fixed in the groove, a displacement block is slidably connected inside the fixed frame, opposite sides of the displacement block are rotatably connected with a push rod, each push rod is rotatably connected with a moving block, and the moving block is vertically slidably connected to the inside of the groove.

8. A friction press according to claim 7, characterized in that: One of the moving blocks is fixedly connected to the first arc-dividing member, and the other of the moving blocks is fixedly connected to the second arc-dividing member.

9. A friction press according to claim 8, characterized in that: A compression spring is connected between the displacement block and the inner wall of the groove.

10. A friction press according to claim 9, characterized in that: When the compression spring is in an initial state, there is a certain distance between the first arc-dividing member and the second arc-dividing member.

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