A die forging press worktable clamping device and its working method

Abstract

The application discloses a die forging press workbench clamping device and a working method thereof and belongs to the technical field of die forging equipment. The die forging press workbench clamping device comprises positioning assemblies and clamping assemblies arranged on the two sides of a workbench. The positioning assemblies and the clamping assemblies are detachably connected with supporting beams. The output end of the positioning assembly can be close to or away from the workbench along the horizontal direction. The clamping assembly comprises a hanging plate. The lower side of the hanging plate is detachably connected with the supporting beam. The middle part of the hanging plate is provided with a clamping strip. The upper part of the hanging plate is provided with a clamping driving unit. The output end of the clamping driving unit is connected with a pressing block. The side part of the workbench is provided with a wedge-shaped groove. The lower part of the wedge-shaped groove is provided with a pressing strip. The side of the pressing block facing the workbench is provided with a pressing inclined surface. After the pressing block moves by a preset distance, the pressing inclined surface and the inclined surface of the groove wall of the wedge-shaped groove form a wedge-shaped cooperation. The clamping strip and the pressing strip abut. The die forging press workbench clamping device can provide greater vertical clamping force and has accurate positioning function. Moreover, the die forging press workbench clamping device can realize overload protection through gradual deformation of itself, so that the workbench and the main machine structure are prevented from being damaged.

Description

Technical Field

[0001] This invention relates to the field of die forging equipment technology, specifically to a clamping device for a die forging press worktable and its working method. Background Technology

[0002] During the die forging process, after the moving worktable carries the die into the working position of the press, it needs to be reliably fixed by a clamping device to resist the huge draft force and eccentric load generated during forging, so as to ensure the forming accuracy of the forging and the safety of the equipment. Currently, the commonly used moving worktable clamping devices mostly adopt hydraulic cylinders in combination with simple pressure claw structures to apply clamping force from the side of the worktable and clamp the worktable on the support beam.

[0003] However, the clamping force of the aforementioned traditional clamping devices relies on a single source: the frictional force provided by the positive pressure of the clamping claws to resist the pull-out force. This limited clamping force is insufficient to meet the pull-out force requirements of a 10,000-ton forging press, which demands thousands of tons of force. Furthermore, existing clamping devices lack positioning capabilities, making it difficult to guarantee the positional accuracy of the worktable during each movement, thus affecting die alignment. In addition, under extreme off-center loads or overload pull-out conditions, traditional clamping devices often experience brittle fracture or sudden failure when reaching their load-bearing limits. The enormous impact load is directly transmitted to the worktable and even the press body, easily causing irreversible structural damage, resulting in extremely high maintenance costs and long downtime. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a clamping device for a forging press worktable and its working method, which has a large clamping force and precise positioning function, and can also achieve overload protection through its own gradual deformation to avoid damage to the worktable and main machine structure.

[0005] The technical solution of the present invention is as follows: In a first aspect of the invention, a clamping device for a forging press table is provided, comprising a positioning assembly and a clamping assembly; The positioning components are symmetrically arranged on both sides of the worktable. The worktable is provided with a support beam at its lower part. The bottom of the positioning components is detachably connected to the support beam. The output end of the positioning components can move closer to or further away from the worktable in the horizontal direction. Multiple clamping assemblies are provided and symmetrically arranged on both sides of the worktable. The clamping assemblies on the same side as the positioning assembly are respectively arranged on both sides of the positioning assembly. The clamping assembly includes a hanging plate, the lower side of which is detachably connected to a support beam. A clamping strip is provided in the middle of the hanging plate, and a clamping drive unit is provided in the upper part of the hanging plate. A pressing block is connected to the output end of the clamping drive unit. The pressing block can move closer to or away from the worktable in the horizontal direction under the drive of the clamping drive unit. The workbench is provided with a wedge-shaped groove on its side and a clamping strip on the lower edge of its side. The clamping block is provided with a clamping inclined surface on the side facing the workbench, which is consistent with the inclination of the wedge-shaped groove. The clamping block moves a preset distance toward the workbench. The clamping inclined surface and the inclined surface of the wedge-shaped groove wall form a wedge-shaped fit structure. The clamping strip abuts against the clamping strip.

[0006] In some embodiments of the present invention, a guide bar is also included. The bottom of the worktable is provided with an installation groove along its production movement direction. The guide bar is detachably installed in the installation groove. The guide bar is slidably disposed on the top of the support beam. The length of the guide bar along the production movement direction of the worktable is greater than the length of the worktable.

[0007] In some embodiments of the present invention, the top of the support beam is provided with a slide rail, the cross-section of the slide rail is configured as a trapezoidal structure, and the width of the upper opening of the slide rail is greater than the width of the bottom surface of the slide rail. The upper part of the guide strip is provided with an installation part, which is a rectangular strip structure adapted to the installation groove. The lower part of the installation part is provided with a sliding part, which is a trapezoidal structure adapted to the slide rail. The guide strip has a positioning notch in the middle.

[0008] In some embodiments of the present invention, a positioning cylinder is provided outside the positioning drive unit, and a positioning drive unit is provided in the positioning cylinder. A transition cylinder is provided at one end of the positioning cylinder near the worktable, and a mounting box is provided on the side of the transition cylinder near the worktable. A guide sleeve is provided in the middle of the mounting box, and a positioning pin is connected to the output end of the positioning drive unit through the guide sleeve. A positioning hole is provided on the side of the worktable, and the positioning pin is adapted to the positioning hole. The positioning pin is configured as a rectangular structure.

[0009] In some embodiments of the present invention, the mounting box is provided with a positioning strip in the middle of the workbench, the upper part of the positioning strip is provided with an inclined structure, the inclined structure is inclined from top to bottom along the direction towards the workbench, the clamping block moves a preset distance toward the workbench, and the positioning strip abuts against the clamping strip. The lower part of the mounting box is provided with multiple positioning rods, and the multiple positioning rods are set at preset distances; The bottom of the mounting box is also equipped with a positioning adjustment block.

[0010] In some embodiments of the present invention, the hanging plate is configured as a C-shaped structure, the opening of the C-shaped structure is oriented toward the workbench, the upper edge and the lower edge of the hanging plate are both convex toward the workbench, the upper edge of the hanging plate is disposed in a wedge-shaped groove, a clamping block is disposed at the lower part of the upper edge, and the upper part of the lower edge of the hanging plate abuts against the support beam. The lower part of the hanging plate is provided with multiple clamping rods, and the multiple clamping rods are set at preset distances; The bottom of the hanging plate is also equipped with a clamping adjustment block.

[0011] In some embodiments of the present invention, guide blocks are provided on both sides of the upper part of the hanging plate. The guide blocks are configured as L-shaped structures. The end of the guide block facing the worktable is provided with a mating inclined surface. The mating inclined surface is inclined from bottom to top along the direction towards the worktable. The guide block has a guide groove on the side facing the clamping block. The two ends of the clamping block are slidably mounted on the guide grooves of the two guide blocks. The top of the guide groove facing the worktable has a groove structure. The bottom of the two ends of the clamping block has a protrusion structure, which is adapted to the groove structure.

[0012] In some embodiments of the present invention, the output end of the clamping drive unit is provided with an annular groove, the middle part of the clamping block is provided with a cylindrical cavity, the cylindrical cavity is provided with an annular protrusion structure, and the annular protrusion structure is adapted to and connected to the annular groove. The output end of the clamping drive unit is also provided with a disc, which is located on the side of the clamping block away from the worktable, and the diameter of the disc is larger than the diameter of the cylindrical cavity.

[0013] In some embodiments of the present invention, the clamping ramp is inclined from bottom to top along the direction toward the worktable, and the inclination angle of the clamping ramp is between 40° and 50°. The clamping bar is provided with a clamping slope, which is inclined from top to bottom along the direction toward the worktable.

[0014] In a second aspect of the invention, a method for operating a clamping device for a forging press worktable is provided, comprising: The workbench moves along the support beam to the working position; The output end of the positioning component extends out and is inserted into the positioning hole on the side of the worktable to complete the horizontal positioning of the worktable. The clamping drive unit pushes the clamping block closer to the worktable in the horizontal direction. The clamping inclined surface of the clamping block is wedge-fitted with the inclined surface of the wedge groove on the side of the worktable. The clamping strip in the middle of the hanging plate abuts against the abutting strip at the bottom of the wedge groove, restricting the displacement of the worktable in the vertical and horizontal directions. During the die forging process, the positioning components and guide bars remain in working condition; After the die forging is completed, the clamping drive unit reverses its action, the clamping block resets, and the clamping bar and the abutment bar disengage. The output end of the positioning component retracts and exits the positioning hole on the side of the worktable; The workbench moves out of its working position along the support beam.

[0015] One or more technical solutions of the present invention have the following beneficial effects: The clamping ramp on the clamping block forms a wedge-shaped fit with the ramp wall of the wedge-shaped groove on the side of the worktable. When the clamping drive unit pushes the clamping block to move horizontally, the wedge-shaped fit structure converts the horizontal thrust into a vertically downward component force, pressing the worktable downward against the support beam. At the same time, the clamping strip in the middle of the hanging plate abuts against the clamping strip at the bottom of the wedge-shaped groove, forming a reverse constraint in the vertical direction. The downward component force generated by the wedge-shaped fit and the upward pull force provided by the clamping strip work together to subject the worktable to bidirectional constraint in the vertical direction. The clamping force far exceeds that of traditional solutions that rely on friction, solving the problem that traditional clamping devices rely on a single source of clamping force and only friction to resist draft force.

[0016] Positioning components are symmetrically arranged on both sides of the worktable. The output end of the positioning components is connected to a positioning pin. The side of the worktable has positioning holes. After the worktable moves to the working position, the positioning pins on both sides extend simultaneously and insert into the corresponding positioning holes to precisely lock the worktable and ensure the alignment accuracy between the mold and the press center. This solves the problems of traditional clamping devices lacking positioning function and having poor worktable position accuracy.

[0017] The positioning pin and hanging plate of this device work together and are made of materials with good plasticity and toughness. When the eccentric load or the demolding force exceeds the design bearing limit, the positioning pin and hanging plate will not break suddenly. Instead, they will absorb the overload energy through gradual deformation, causing the worktable to produce a slow and small displacement. This protects the press body from hard impact damage and solves the problem of brittle fracture and direct transmission of impact load to the main structure of traditional clamping devices under extreme working conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a forging press workbench clamping device provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the positioning component provided in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the clamping assembly provided in Embodiment 1 of the present invention; Figure 4 This is a side view of the clamping assembly provided in Embodiment 1 of the present invention. Figure 1 ; Figure 5 This is a side view of the clamping assembly provided in Embodiment 1 of the present invention. Figure 2 ; Figure 6 This is a schematic diagram showing the cooperation between the clamping drive unit and the clamping block provided in Embodiment 1 of the present invention; Figure 7This is a schematic diagram showing the cooperation of the clamping drive unit, the pressing block, and the guide block provided in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the structure of the guide block provided in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the structure of the guide strip provided in Embodiment 1 of the present invention.

[0019] In the picture: 1. Positioning assembly; 101. Transition cylinder; 102. Positioning cylinder; 103. Positioning adjustment block; 104. Positioning tie rod; 105. Guide sleeve; 106. Positioning pin; 107. Mounting housing; 108. Positioning strip; 109. Positioning bevel. 2. Clamping assembly, 201. Hanging plate, 202. Guide block, 203. Clamping drive unit, 204. Pressing block, 205. Clamping rod, 206. Clamping adjustment block, 207. Clamping strip, 208. Guide groove, 209. Pressing inclined surface, 210. Mating inclined surface, 211. Groove structure, 212. Annular groove, 213. Cylindrical cavity, 214. Annular protrusion structure, 215. Disc, 216. Clamping inclined surface; 3. Guide bar; 301. Mounting part; 302. Sliding part; 303. Positioning notch; 4. Support beam; 5. Worktable, 501. Wedge groove. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Example 1 In a typical embodiment of the present invention, such as Figure 1 As shown, a clamping device for a forging press worktable includes a positioning component 1 and a clamping component 2. The positioning component 1 is symmetrically arranged on both sides of the worktable 5. A support beam 4 is provided at the lower part of the worktable 5. The bottom of the positioning component 1 is detachably connected to the support beam 4. The output end of the positioning component 1 can move closer to or further away from the worktable 5 in a horizontal direction. Multiple clamping components 2 are provided, symmetrically arranged on both sides of the worktable 5. The clamping components 2 on the same side as the positioning components 1 are respectively arranged on both sides of the positioning components 1.

[0022] Positioning components 1 are symmetrically arranged on both sides of the worktable 5, enabling simultaneous positioning and constraint of the worktable 5 from both sides. When the worktable 5 moves along the support beam 4 to the working position, the positioning components 1 on both sides act simultaneously, precisely limiting the worktable 5 in the horizontal direction. This dual-side synchronous positioning method can effectively eliminate the positional deviation of the worktable 5 in the horizontal plane, ensuring the alignment accuracy between the mold and the press center, thereby improving the forming quality of the forging.

[0023] Multiple clamping components 2 are provided, symmetrically arranged on both sides of the worktable 5. The clamping components 2 on the same side as the positioning components 1 are respectively arranged on both sides of the positioning components 1. Figure 3 As shown, the clamping assembly 2 includes a hanging plate 201, the lower side of which is detachably connected to the support beam 4. A clamping strip 207 is provided in the middle of the hanging plate 201, and a clamping drive unit 203 is provided in the upper part of the hanging plate 201. A clamping block 204 is connected to the output end of the clamping drive unit 203. The clamping block 204 can move closer to or away from the worktable 5 in the horizontal direction under the drive of the clamping drive unit 203.

[0024] By installing multiple clamping components 2 on both sides of the worktable 5, the clamping force can be distributed to multiple locations on the worktable 5. Compared with single-point clamping, the multi-point distributed layout ensures that the clamping force is evenly distributed laterally on the worktable 5, avoiding concentrated clamping force that could lead to localized deformation or excessive stress on the worktable 5. Furthermore, the structure of each clamping component 2 is more compact, facilitating manufacturing and on-site installation, and also aiding in subsequent maintenance and replacement.

[0025] like Figure 1 As shown, the side of the worktable 5 is provided with a wedge groove 501, and the lower edge of the side of the worktable 5 is provided with a clamping strip. The clamping block 204 is provided with a clamping inclined surface 209 with the same inclination as the wedge groove 501 on the side facing the worktable 5. After the clamping block 204 moves a preset distance toward the worktable 5, the clamping inclined surface 209 and the inclined surface of the groove wall of the wedge groove 501 form a wedge-shaped fit structure, and the clamping strip 207 abuts against the clamping strip.

[0026] The clamping inclined surface 209 and the inclined surface of the wedge-shaped groove 501 form a wedge-shaped engagement structure. This structure can convert the horizontal thrust generated by the clamping drive unit 203 into vertical and horizontal components. When the clamping block 204 approaches the worktable 5 horizontally under the push of the clamping drive unit 203, the clamping inclined surface 209 and the inclined surface of the wedge-shaped groove 501 gradually come into contact. As the clamping block 204 continues to move horizontally, the wedge-shaped engagement structure applies a vertically downward force to the worktable 5, causing the worktable 5 to press against the support beam 4 downwards, while also forming a limiting constraint on the worktable 5 in the horizontal direction.

[0027] The clamping strip 207 in the middle of the hanging plate 201 abuts against the abutting strip at the lower edge of the side of the worktable 5, forming another vertical constraint, which, together with the clamping block 204, clamps the worktable. When the draft force acts upward, the clamping block 204, together with the clamping strip 207, pulls the worktable 5, preventing the worktable 5 from moving upward. At the same time, the wedge-shaped fit structure also limits the worktable 5 in the horizontal direction, and together with the positioning component 1, resists the eccentric load generated during the forging process.

[0028] like Figure 1 and Figure 9As shown, the device also includes a guide bar 3, and the bottom of the worktable 5 is provided with a mounting groove along its production movement direction. The guide bar 3 is detachably installed in the mounting groove, and the guide bar 3 is slidably set on the top of the support beam 4. The length of the guide bar 3 along the production movement direction of the worktable 5 is greater than the length of the worktable 5.

[0029] The guide bar 3 serves as the guide for the movement of the worktable 5. When the worktable 5 moves into or out of the working position, the guide bar 3 cooperates with the slide rail at the top of the support beam 4 to guide the worktable 5 to move smoothly in the set direction, preventing the worktable 5 from deviating or shaking during movement. The length of the guide bar 3 is greater than the length of the worktable 5, ensuring that the worktable 5 has sufficient guiding length throughout its movement, avoiding situations where the worktable 5 is suspended or derailed at either end of its stroke. The guide bar 3 is detachably installed in the mounting slot, and can be directly replaced when it wears out, without replacing the entire worktable 5, thus reducing maintenance costs.

[0030] like Figure 1 As shown, the top of the support beam 4 is equipped with a slide rail. The cross-section of the slide rail is a trapezoidal structure, and the width of the upper opening of the slide rail is greater than the width of the bottom surface of the slide rail. Figure 9 As shown, the upper part of the guide bar 3 is provided with an installation part 301, which is a rectangular strip structure that is adapted to the installation groove. The lower part of the installation part 301 is provided with a sliding part 302, which is a trapezoidal structure adapted to the slide rail. The middle part of the guide bar 3 is provided with a positioning notch 303.

[0031] The trapezoidal slide rail and sliding part 302 cooperate to allow the guide bar 3 to slide along the length of the support beam 4. During the operation of the hydraulic press, the worktable 5 bears a huge forging load. The trapezoidal slide rail structure can effectively withstand the vertical component of the force, preventing the guide bar 3 from coming out of the slide rail under heavy load, thus ensuring the positional stability of the worktable 5 during the die forging process. The rectangular strip-shaped mounting part 301 cooperates with the mounting groove to restrict the rotation of the guide bar 3 relative to the worktable 5, ensuring that the guide bar 3 and the worktable 5 always maintain the correct relative orientation. The positioning notch 303 is used to position the guide bar 3 before installing it on the worktable 5, ensuring installation accuracy.

[0032] like Figure 2 As shown, a positioning cylinder 102 is provided outside the positioning drive unit, and a positioning drive unit is provided in the positioning cylinder 102. A transition cylinder 101 is provided at one end of the positioning cylinder 102 near the worktable 5. A mounting box 107 is provided on the side of the transition cylinder 101 near the worktable 5. A guide sleeve 105 is provided in the middle of the mounting box 107. The output end of the positioning drive unit passes through the guide sleeve 105 and is connected to a positioning pin 106. A positioning hole is provided on the side of the worktable 5. The positioning pin 106 is adapted to the positioning hole and is set as a rectangular structure.

[0033] The transition cylinder 101 connects the positioning cylinder 102 and the mounting housing 107, providing a guide channel for the extension and retraction of the positioning pin 106. When the positioning drive unit is working, its output end pushes the positioning pin 106 to slide along the guide sleeve 105, causing the positioning pin 106 to extend out of the mounting housing 107 and insert into the positioning hole on the side of the worktable 5. The positioning pin 106 is designed with a rectangular structure, which, after engaging with the positioning hole, can simultaneously restrict the displacement of the worktable 5 in multiple directions. Compared to a circular positioning pin, the rectangular positioning pin, after being inserted into the positioning hole, not only restricts the displacement of the worktable 5 along the production movement direction but also restricts the rotation of the worktable 5 around the vertical axis, improving the reliability of positioning.

[0034] Positioning components 1 are symmetrically arranged on both sides of the worktable 5. Positioning pins 106 on both sides are simultaneously inserted into the positioning holes of the worktable 5, precisely locking the worktable 5 in its working position. After positioning, the positioning drive unit maintains a pressure-holding state. Even when the worktable 5 is subjected to an off-center load, the positioning pins 106 can maintain the positioning state through their own rigidity and the pressure-holding effect of the hydraulic system. When the off-center load exceeds the design limit, the positioning pins 106 will slowly deform, allowing the worktable 5 to produce a small displacement, thereby preventing hard damage to the press body structure and providing operators with a time window for fault detection and downtime maintenance.

[0035] like Figure 2 As shown, a positioning strip 108 is provided in the middle of the mounting housing 107 facing the worktable 5. The upper part of the positioning strip 108 is provided as a positioning slope 109, which is inclined from top to bottom along the direction towards the worktable 5. After the clamping block 204 moves a preset distance towards the worktable 5, the positioning strip 108 abuts against the clamping strip. Multiple positioning pull rods 104 are provided at the lower part of the mounting housing 107. The multiple positioning pull rods 104 are set at preset intervals. A positioning adjustment block 103 is also provided at the bottom of the mounting housing 107.

[0036] The positioning strip 108 abuts against the clamping strip on the side of the worktable 5, providing auxiliary support to the worktable 5 in the vertical direction. The positioning ramp 109 increases the contact area between the positioning strip 108 and the clamping strip, reducing contact stress and helping to extend the service life of the components. When the positioning assembly 1 is installed, the height of the mounting box 107 relative to the support beam 4 can be finely adjusted by adjusting the thickness of the positioning adjustment block 103, so that the positioning pin 106 is precisely aligned with the positioning hole on the side of the worktable 5. The positioning pull rod 104 passes through the mounting box 107 and is fixedly connected to the support beam 4, firmly fixing the positioning assembly 1 to the support beam 4 and ensuring that the positioning assembly 1 does not shift during operation.

[0037] like Figure 3 and Figure 4As shown, the hanging plate 201 is configured with a U-shaped structure, with the opening of the U-shaped structure facing the worktable 5. Both the upper and lower edges of the hanging plate 201 protrude towards the worktable 5. The upper edge of the hanging plate 201 is set in a wedge-shaped groove 501, and a clamping block 204 is set at the lower part of the upper edge. The upper part of the lower edge of the hanging plate 201 abuts against the support beam 4. The lower part of the hanging plate 201 is provided with multiple clamping rods 205, which are set at preset intervals. A clamping adjustment block 206 is also provided at the bottom of the hanging plate 201.

[0038] The mounting plate 201 adopts a U-shaped structure, with both its upper and lower edges protruding towards the worktable 5. This structure creates a lateral encircling layout of the mounting plate 201 on the worktable 5, enhancing its overall rigidity. The upper edge extends into the wedge-shaped groove 501, allowing the upper end of the mounting plate 201 to abut against the side of the worktable 5, shortening the transmission path of the clamping force. The lower clamping rod 205 passes through the mounting plate 201 and is fixedly connected to the support beam 4, firmly securing the entire clamping assembly 2 to the support beam 4. The clamping adjustment block 206 is used to adjust the height of the mounting plate 201 during installation, ensuring that the clamping slope 209 of the clamping block 204 accurately engages with the slope of the wedge-shaped groove 501.

[0039] like Figure 7 and Figure 8 As shown, guide blocks 202 are provided on both sides of the upper part of the hanging plate 201. The guide blocks 202 are L-shaped. One end of the guide block 202 facing the worktable 5 is provided with a mating inclined surface 210. The mating inclined surface 210 is inclined from bottom to top along the direction towards the worktable 5. The side of the guide block 202 facing the pressing block 204 is provided with a guide groove 208. The two ends of the pressing block 204 are respectively slidably disposed on the guide groove 208 of the two guide blocks 202. The top of the side of the guide groove 208 facing the worktable 5 is provided with a groove structure 211. The bottom of the two ends of the pressing block 204 is provided with a protrusion structure. The protrusion structure is adapted to the groove structure 211.

[0040] The guide grooves 208 of the guide blocks 202 on both sides jointly limit the sliding direction of the clamping block 204, ensuring that the clamping block 204 can only move horizontally under the push of the clamping drive unit 203, and will not deflect or tilt. The L-shaped guide block 202 plays a dual role of support and guidance, simplifying the structural layout. The groove structure 211 set on the top of the guide groove 208 facing the worktable 5 cooperates with the protrusion structure at both ends of the clamping block 204. When the clamping block 204 moves into place towards the worktable 5, the protrusion structure is engaged in the groove structure 211, which plays a positioning and limiting role. It can be understood that both the protrusion structure and the groove structure 211 have smooth edges. When the clamping drive unit 203 pulls the clamping block 204 to reset, the protrusion structure can disengage from the groove structure 211. It can maintain the position of the clamping block 204 even after the hydraulic system is depressurized, preventing the worktable 5 from loosening due to hydraulic fluctuations during the forging process, and improving the safety of the device.

[0041] like Figure 6 As shown, the output end of the clamping drive unit 203 is provided with an annular groove 212, and the middle part of the clamping block 204 is provided with a cylindrical cavity 213. The cylindrical cavity 213 is provided with an annular protrusion structure 214. The annular protrusion structure 214 is adapted to and connected to the annular groove 212. The output end of the clamping drive unit 203 is also provided with a disc 215. The disc 215 is located on the side of the clamping block 204 away from the worktable 5. The diameter of the disc 215 is larger than the diameter of the cylindrical cavity 213.

[0042] An annular protrusion 214 is embedded in an annular groove 212, achieving axial connection between the output end of the clamping drive unit 203 and the clamping block 204. When the clamping drive unit 203 pushes the output end out, the clamping block 204 moves towards the worktable 5 through the cooperation of the annular protrusion 214 and the annular groove 212. When the clamping drive unit 203 pulls the output end back, the clamping block 204 is also moved away from the worktable 5 through the same cooperation structure. The disc 215 is located on the side of the clamping block 204 away from the worktable 5, and its diameter is larger than the diameter of the cylindrical cavity 213. It acts as a limit when the clamping drive unit 203 pushes the clamping block 204, ensuring the reliability of the device's operation.

[0043] The clamping ramp 209 is inclined from bottom to top along the direction towards the worktable 5, and the inclination angle of the clamping ramp 209 is between 40° and 50°. This angle range can generate an appropriate vertical component force under a certain horizontal thrust of the clamping drive unit 203. If the angle is too small, the vertical component force is insufficient, making it difficult to effectively clamp the worktable 5 downward; if the angle is too large, the required horizontal thrust increases sharply, requiring the use of a larger clamping drive unit 203, which increases the equipment cost.

[0044] Within an angle range of 40°-50°, the wedge-shaped mating structure also possesses a self-locking characteristic. When the worktable 5 is subjected to an upward draft force, this force is transmitted to the clamping inclined surface 209 through the inclined surface of the wedge groove 501, generating a horizontal component force. The direction of this horizontal component force is opposite to the pushing direction of the clamping drive unit 203. However, since the wedge angle is within the self-locking angle range, this horizontal component force is insufficient to overcome the friction between the inclined surfaces and push the clamping block 204 back, thereby achieving self-locking and further improving the safety of the device.

[0045] The clamping bar 207 is provided with a clamping inclined surface 216. The clamping inclined surface 216 is inclined from top to bottom along the direction towards the worktable and is adapted to abut the abutting bar, thereby cooperating with the pressing block 204 to press the worktable 5.

[0046] The working method of the above-mentioned clamping device for the worktable of the die forging press includes the following steps.

[0047] The worktable 5 moves along the support beam 4 to the working position. During this process, the sliding part 302 of the guide bar 3 slides along the slide rail at the top of the support beam 4, guiding the worktable 5 to move smoothly in the set direction.

[0048] When the worktable 5 reaches the working position, the output end of the positioning component 1 extends and inserts into the positioning hole on the side of the worktable 5, completing the horizontal positioning of the worktable 5. The positioning drive unit pushes the positioning pin 106 to slide along the guide sleeve 105, causing the positioning pin 106 to extend out of the mounting housing 107. The positioning pin 106 passes through the positioning hole on the side of the worktable 5, precisely locking the worktable 5 in the working position. The positioning components 1 on both sides act simultaneously, positioning the worktable 5 from both sides, ensuring the positional accuracy of the worktable 5. After positioning is completed, the positioning drive unit maintains a pressure-holding state, providing continuous horizontal anti-eccentric load capability for the subsequent die forging process.

[0049] The clamping drive unit 203 pushes the clamping block 204 horizontally towards the worktable 5. This horizontal arrangement of the clamping drive unit 203 achieves vertical clamping without occupying excessive installation space. The clamping block 204 slides horizontally along the guide groove 208 on the guide block 202. Once in position, the protruding structures at both ends of the clamping block 204 engage with the groove structure 211 for positioning and limiting. The clamping inclined surface 209 of the clamping block 204 wedges tightly against the inclined surface of the wedge-shaped groove 501 on the side of the worktable 5. As the clamping block 204 continues to move horizontally, the wedge-shaped engagement structure generates a downward vertical force, pressing the worktable 5 downwards. Simultaneously, the clamping strip 207 in the middle of the hanging plate 201 abuts against the abutment strip at the lower edge of the side of the worktable 5, providing support from below. At this point, the worktable 5 is subjected to bidirectional constraints in the vertical direction (downward and upward) and is limited horizontally by the wedge-shaped engagement structure and the positioning component 1.

[0050] During the forging process, the positioning assembly 1 and clamping assembly 2 remain operational. The draft force generated during forging is transmitted through the inclined surface of the wedge groove 501 to the clamping inclined surface 209, and then to the clamping drive unit 203. When the draft force or eccentric load does not exceed the design bearing limit of the device, each component remains within the elastic deformation range, and the worktable 5 is reliably fixed. When the draft force or eccentric load exceeds the design bearing limit, the positioning pin 106 and the hanging plate 201 cooperate to undergo slow, gradual deformation, causing a slight displacement of the worktable 5, thereby preventing hard damage to the press body structure. In addition, the positioning pin 106 and the hanging plate 201 are both made of 42CrMo material, which has good plasticity and toughness, further protecting the worktable 5.

[0051] After the forging is completed, the clamping drive unit 203 reverses its movement, and its output end retracts. Through the cooperation of the annular groove 212 and the annular protrusion structure 214, it pulls the clamping block 204 back to its original position. The clamping block 204 slides horizontally along the guide groove 208 of the guide block 202, and the clamping inclined surface 209 disengages from the inclined surface of the wedge-shaped groove 501. The clamping bar 207 disengages from the abutment bar. The vertical constraint of the worktable 5 is released.

[0052] The output end of positioning component 1 retracts. The positioning drive unit reverses its action, pulling the positioning pin 106 to slide along the guide sleeve 105, causing the positioning pin 106 to exit the positioning hole on the side of the worktable 5. The horizontal constraint of the worktable 5 is released.

[0053] The worktable 5 moves out of its working position along the support beam 4, and the guide bar 3 guides the worktable 5 to move out smoothly, entering the next work cycle. At this point, a complete worktable clamping and releasing process is completed.

[0054] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A clamping device for the worktable of a die forging press, characterized in that, Includes positioning components and clamping components; The positioning components are symmetrically arranged on both sides of the worktable. The worktable is provided with a support beam at its lower part. The bottom of the positioning components is detachably connected to the support beam. The output end of the positioning components can move closer to or further away from the worktable in the horizontal direction. Multiple clamping assemblies are provided and symmetrically arranged on both sides of the worktable. The clamping assemblies on the same side as the positioning assembly are respectively arranged on both sides of the positioning assembly. The clamping assembly includes a hanging plate, the lower side of which is detachably connected to a support beam. A clamping strip is provided in the middle of the hanging plate, and a clamping drive unit is provided in the upper part of the hanging plate. A pressing block is connected to the output end of the clamping drive unit. The pressing block can move closer to or away from the worktable in the horizontal direction under the drive of the clamping drive unit. The workbench is provided with a wedge-shaped groove on its side and a clamping strip on the lower edge of its side. The clamping block is provided with a clamping inclined surface on the side facing the workbench, which is consistent with the inclination of the wedge-shaped groove. The clamping block moves a preset distance toward the workbench. The clamping inclined surface and the inclined surface of the wedge-shaped groove wall form a wedge-shaped fit structure. The clamping strip abuts against the clamping strip.

2. The clamping device for the worktable of a forging press as described in claim 1, characterized in that, It also includes a guide bar. The bottom of the worktable is provided with an installation groove along its production movement direction. The guide bar is detachably installed in the installation groove. The guide bar is slidably disposed on the top of the support beam. The length of the guide bar along the production movement direction of the worktable is greater than the length of the worktable.

3. The clamping device for the worktable of a forging press as described in claim 2, characterized in that, The top of the support beam is provided with a slide rail, the cross-section of which is a trapezoidal structure, and the width of the upper opening of the slide rail is greater than the width of the bottom surface of the slide rail. The upper part of the guide strip is provided with an installation part, which is a rectangular strip structure adapted to the installation groove. The lower part of the installation part is provided with a sliding part, which is a trapezoidal structure adapted to the slide rail. The guide strip has a positioning notch in the middle.

4. The clamping device for the worktable of a forging press as described in claim 1, characterized in that, The positioning drive unit has a positioning cylinder on its exterior, and a positioning drive unit is installed inside the positioning cylinder. A transition cylinder is provided at one end of the positioning cylinder near the worktable. A mounting box is provided on the side of the transition cylinder near the worktable. A guide sleeve is provided in the middle of the mounting box. A positioning pin is connected to the output end of the positioning drive unit through the guide sleeve. A positioning hole is provided on the side of the worktable. The positioning pin is adapted to the positioning hole and is set as a rectangular structure.

5. The clamping device for the worktable of a forging press as described in claim 4, characterized in that, The mounting box is provided with a positioning strip in the middle of the workbench, and the upper part of the positioning strip is provided with a positioning slope. The positioning slope is inclined from top to bottom along the direction towards the workbench. The clamping block moves a preset distance toward the workbench, and the positioning strip abuts against the clamping strip. The lower part of the mounting box is provided with multiple positioning rods, and the multiple positioning rods are set at preset distances; The bottom of the mounting box is also equipped with a positioning adjustment block.

6. The clamping device for the worktable of a forging press as described in claim 1, characterized in that, The hanging plate is configured as a C-shaped structure, with the opening of the C-shaped structure facing the workbench. The upper and lower edges of the hanging plate both protrude towards the workbench. The upper edge of the hanging plate is set in a wedge-shaped groove, and a clamping block is set at the lower part of the upper edge. The upper part of the lower edge of the hanging plate abuts against the support beam. The lower part of the hanging plate is provided with multiple clamping rods, and the multiple clamping rods are set at preset distances; The bottom of the hanging plate is also equipped with a clamping adjustment block.

7. The clamping device for the worktable of a forging press as described in claim 1, characterized in that, The upper two sides of the hanging plate are respectively provided with guide blocks. The guide blocks are configured with an L-shaped structure. The end of the guide block facing the worktable is provided with a mating slope. The mating slope is inclined from bottom to top along the direction towards the worktable. The guide block has a guide groove on the side facing the clamping block. The two ends of the clamping block are slidably mounted on the guide grooves of the two guide blocks. The top of the guide groove facing the worktable has a groove structure. The bottom of the two ends of the clamping block has a protrusion structure, which is adapted to the groove structure.

8. The clamping device for the worktable of a forging press as described in claim 1, characterized in that, The output end of the clamping drive unit is provided with an annular groove, the middle part of the clamping block is provided with a cylindrical cavity, the cylindrical cavity is provided with an annular protrusion structure, and the annular protrusion structure is adapted to and connected to the annular groove. The output end of the clamping drive unit is also provided with a disc, which is located on the side of the clamping block away from the worktable, and the diameter of the disc is larger than the diameter of the cylindrical cavity.

9. The clamping device for the worktable of a forging press as described in claim 1, characterized in that, The clamping ramp is inclined from bottom to top along the direction toward the workbench, and the inclination angle of the clamping ramp is between 40° and 50°. The clamping bar is provided with a clamping slope, which is inclined from top to bottom along the direction toward the worktable.

10. The working method of the clamping device for the worktable of a forging press as described in any one of claims 1-9, characterized in that, include: The workbench moves along the support beam to the working position; The output end of the positioning component extends out and is inserted into the positioning hole on the side of the worktable to complete the horizontal positioning of the worktable. The clamping drive unit pushes the clamping block closer to the worktable in the horizontal direction. The clamping inclined surface of the clamping block is wedge-fitted with the inclined surface of the wedge groove on the side of the worktable. The clamping strip in the middle of the hanging plate abuts against the abutting strip at the bottom of the wedge groove, restricting the displacement of the worktable in the vertical and horizontal directions. During the die forging process, the positioning components and guide bars remain in working condition; After the die forging is completed, the clamping drive unit reverses its action, the clamping block resets, and the clamping bar and the abutment bar disengage. The output end of the positioning component retracts and exits the positioning hole on the side of the worktable; The workbench moves out of its working position along the support beam.

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