Rapid workpiece clamping device for machining

Abstract

The utility model provides a quick workpiece clamping device for machining. The quick workpiece clamping device aims at solving the problems that in a traditional clamping mode, workpiece clamping is not firm, positioning is not accurate, adaptability is poor, and discharging efficiency is low. The device comprises a base, a clamping plate, a driving mechanism, a fixing mechanism and a discharging mechanism. The driving mechanism accurately controls the clamping action of the clamping plate through a motor and a bidirectional lead screw, and stable clamping of a workpiece is achieved. The fixing mechanism adopts the structure of a concave plate, an inserting rod and a spring, so that clamping plates are conveniently and quickly replaced, and the clamping efficiency is improved; the discharging mechanism controls automatic discharging of workpieces through an electric push rod and a roller, manual intervention is reduced, and the production efficiency is improved. Limiting plates on the two sides of the containing plate prevent horizontal deviation, and it is ensured that workpieces are accurately positioned. By means of the innovative design, the machining automation degree, the clamping precision and the discharging efficiency are improved, manual operation is reduced, and the device is suitable for machining of various workpieces and has good market application prospects.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and specifically relates to a quick clamping device for workpieces in machining. Background Technology

[0002] In machining, workpiece clamping is always a key factor affecting machining efficiency and accuracy. Traditional workpiece clamping methods mainly rely on manual operation, usually requiring the fixture and workpiece to be aligned and manually fixed one by one. This method is not only time-consuming but also difficult to operate. Especially in high-precision machining or mass production, the efficiency of traditional clamping methods is low, which can easily lead to inaccurate workpiece positioning or insecure clamping, thereby affecting production efficiency and machining quality.

[0003] Currently, there are some automated workpiece clamping devices on the market. These devices generally use pneumatic or hydraulic clamping technology, or achieve automatic adjustment and clamping of the fixtures through an electric drive system. However, these devices have high costs and complex structures during use, especially pneumatic and hydraulic systems, which have high maintenance costs and strict environmental requirements. Some devices cannot achieve quick fixture changes, resulting in a relatively long time required for workpiece clamping and unloading.

[0004] In addition, existing equipment generally lacks flexibility. When faced with workpieces of different specifications and shapes, it is often necessary to adjust the fixtures or use multiple devices to complete the clamping work. This not only increases the difficulty of operation in actual production, but also limits the versatility and applicability of the equipment. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a quick clamping device for machining workpieces. It can improve clamping efficiency, reduce manual operation intensity, reduce production time, and has good adaptability, enabling quick clamping and precise fixation of different workpieces.

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

[0007] A quick workpiece clamping device for machining includes a base, with mounting plates welded to the bottom of both sides of the base to facilitate installation. The base is U-shaped and has a placement plate for placing workpieces.

[0008] The top of the base is provided with two clamping plates for clamping the workpiece. The clamping plates are composed of clamping blocks and L-shaped insert plates, and one side of the insert plate is fixedly connected to one side of the clamping block.

[0009] One side of the base is provided with a drive mechanism for driving the clamping plate to hold the workpiece.

[0010] The base is provided with a feeding mechanism for feeding workpieces;

[0011] The top of the base is provided with a fixing mechanism for fixing the clamping plate.

[0012] Furthermore, the drive mechanism includes a housing, a bidirectional lead screw, a motor, and two movable frames. One side of the housing is fixedly connected to one side of the base. The two ends of the bidirectional lead screw are rotatably connected to the inner walls of both sides of the housing. One side of the motor is fixedly connected to one side of the housing, and its output end passes through one side of the housing and is fixedly connected to one end of the bidirectional lead screw. The movable frames are U-shaped, and one end of each movable frame is slidably connected to the inner wall of one side of the housing. A lead screw nut is embedded in one side of the movable frame, and the lead screw nut is threadedly connected to the bidirectional lead screw.

[0013] Furthermore, the fixing mechanism includes a concave plate, a plug rod, a frame, a spring, and a fixing ring. The bottom of the concave plate is fixedly connected to one side of the top of the movable frame. One end of the plug plate is inserted into the concave plate. One side of the frame is fixedly connected to one side of the concave plate. Both the frame and the concave plate have moving holes to facilitate the movement of the plug rod. The outer side of the plug rod is slidably connected to the inner wall of the moving hole. The spring is sleeved on the plug rod. The fixing ring is fixedly sleeved on the plug rod. One end of the spring is fixedly connected to one side of the fixing ring, and the other end is fixedly connected to one side of the frame. One side of the plug plate has a plug hole, and one end of the plug rod is inserted into the plug hole.

[0014] Furthermore, the feeding mechanism includes a third hinge seat, a first hinge seat, a second hinge seat, and a first electric push rod. The bottom of the third hinge seat is fixedly connected to the bottom inner wall of the base. One side of the first hinge seat is fixedly connected to one side of the third hinge seat. The same rotating rod is rotatably arranged on both inner walls of the third hinge seat. A connecting plate is welded to one side of the rotating rod. The top of the connecting plate is fixedly connected to the bottom of the placement plate. The top of the second hinge seat is fixedly connected to one bottom side of the placement plate. The fixed part of the first electric push rod is hinged to the first hinge seat, and the telescopic part of the first electric push rod is hinged to the second hinge seat.

[0015] Furthermore, the inner walls on both sides of the base are fixedly provided with limiting plates for horizontal positioning of the placement plate.

[0016] Furthermore, the placement plate is U-shaped, and the top of the placement plate has multiple through holes. The same movable plate is slidably connected to the inner walls of both sides of the placement plate. Multiple U-shaped frames are fixedly installed on the top of the movable plate. The U-shaped frames are located below the through holes, and the inner walls of the U-shaped frames are rotatably equipped with rollers to reduce friction during material feeding.

[0017] Furthermore, a second electric push rod for raising and lowering the roller is fixedly installed on the bottom inner wall of the placement plate, and the telescopic part of the second electric push rod is fixedly connected to the bottom of the moving plate.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] Firstly, traditional workpiece clamping methods rely on manual operation, which can easily lead to insecure clamping or inaccurate positioning. This device employs a high-precision electric drive system, using a bidirectional lead screw and motor control to ensure precise positioning and clamping of the clamping plates, avoiding the instability caused by manual operation. Driven by the motor, the bidirectional lead screw allows the two moving frames to move precisely, thereby achieving accurate clamping of the workpiece by the clamping plates, effectively improving the stability and accuracy of the clamping process.

[0020] Secondly, existing fixtures and clamping methods are mostly fixed designs, making it difficult to adapt to workpieces of different shapes and sizes. This necessitates manual adjustment or replacement of fixtures during clamping, resulting in low efficiency. This device employs a flexible clamping plate design, consisting of clamping blocks and insert plates. The insert plates are fixedly connected to the clamping blocks, enabling rapid adaptation to workpieces of different shapes and sizes. The fixing mechanism utilizes a concave plate, insert rod, and spring structure, allowing for quick clamping plate replacement when needed. This further improves clamping efficiency and adaptability, reducing workpiece clamping time and labor intensity.

[0021] In existing devices, the workpiece unloading process often relies on manual operation or complex mechanical devices, leading to instability and affecting processing efficiency. This device achieves automatic workpiece unloading through a combination of an unloading mechanism and rollers, coupled with precise control of a second electric push rod. The first electric push rod drives the unloading plate and rollers, ensuring a smooth and rapid unloading process, reducing the need for manual intervention and improving efficiency. The design of the placement plate allows the workpiece to slide smoothly through the rollers, ensuring a smooth unloading process and workpiece safety.

[0022] In addition, in traditional unloading devices, the placement plate is prone to horizontal displacement during use, causing the workpiece to fail to be accurately positioned in the unloading channel. To overcome this problem, this device is designed with limiting plates on both sides of the base, effectively preventing horizontal displacement of the placement plate during use, ensuring accurate positioning of the workpiece during unloading, and thus improving the reliability and stability of the entire unloading process.

[0023] Through the above design, the workpiece quick clamping device for machining provided by this utility model solves a series of problems in the prior art, significantly improves the automation level and production efficiency of machining, not only reduces the burden of manual operation, but also improves clamping accuracy, material unloading efficiency and equipment versatility. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0025] Figure 2 This is a front view structural diagram of the present utility model;

[0026] Figure 3 This is a side view of the structure of this utility model;

[0027] Figure 4 This is a schematic diagram of the fixing mechanism of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Base; 11. Mounting plate; 2. Clamping plate; 21. Clamping block; 22. Insert plate; 3. Placement plate; 31. Through hole; 4. Roller; 41. Moving plate; 42. U-shaped frame; 5. Drive mechanism; 51. Box body; 52. Two-way lead screw; 53. Motor; 6. Fixing mechanism; 61. Concave plate; 62. Frame body; 63. Insert rod; 64. Spring; 65. Fixing ring; 7. Unloading mechanism; 71. First electric push rod; 72. First hinge seat; 73. Second hinge seat; 8. Limiting plate. Detailed Implementation

[0030] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model. Example

[0031] like Figure 1-4 As shown, a quick workpiece clamping device for machining includes a base 1. Mounting plates 11 are welded to the bottom of both sides of the base 1 to facilitate installation. The mounting plates 11 are made of high-quality steel, possessing strong load-bearing capacity and good corrosion resistance. The base 1 is U-shaped, and a placement plate 3 for placing workpieces is provided on the base 1. The placement plate 3 is made of wear-resistant steel plate, possessing good strength and wear resistance, and can adapt to the clamping and processing needs of various workpieces. Two clamping plates 2 are provided on the top of the base 1 for clamping the workpiece. The clamping plates 2 consist of clamping blocks 21 and L-shaped insert plates 22. One side of the insert plate 22 is fixedly connected to one side of the clamping block 21. The insert plate 22 is made of heat-treated steel, possessing high hardness and strength, suitable for long-term use. The clamping blocks 21 are made of high-strength alloy steel, ensuring that the clamp has strong clamping force and a long service life.

[0032] A drive mechanism 5 is provided on one side of the base 1 to drive the clamping plate 2 to clamp the workpiece. The drive mechanism 5 drives the rotation of the bidirectional lead screw 52 through the motor 53, thereby realizing the clamping action of the clamping plate 2. A feeding mechanism 7 is provided on the base 1 for unloading the workpiece. The feeding mechanism 7 drives the movement of the feeding plate and the roller 4 through the second electric push rod 71, thereby realizing the automatic unloading of the workpiece and ensuring the rapid processing of the workpiece. A fixing mechanism 6 is provided on the top of the base 1 for fixing the clamping plate 2. The fixing mechanism 6 can ensure that the clamping plate 2 is stably fixed during use, avoiding the clamping plate from loosening due to vibration or improper operation, thereby ensuring the accuracy of workpiece processing.

[0033] like Figure 1 As shown, the drive mechanism 5 includes a housing 51, a bidirectional lead screw 52, ​​a motor 53, and two moving frames. The housing 51 is made of aluminum alloy, which has good strength and heat dissipation. One side of the housing 51 is fixedly connected to one side of the base 1. The two ends of the bidirectional lead screw 52 are rotatably connected to the inner walls of the two sides of the housing 51, respectively. The motor 53 is a stepper motor, model NEMA17, which has high driving force and precise control capability. One side of the motor 53 is fixedly connected to one side of the housing 51, and the output end passes through one side of the housing 51 and is fixedly connected to one end of the bidirectional lead screw 52. The moving frames are U-shaped, and one end of each of the two moving frames is slidably connected to the inner wall of one side of the housing 51. A lead screw nut is embedded in one side of the moving frame, and the lead screw nut is threadedly connected to the bidirectional lead screw 52 to ensure the precise movement and reliable clamping of the clamping plate 2.

[0034] like Figure 1-4 As shown, the fixing mechanism 6 includes a concave plate 61, a plug rod 63, a frame 62, a spring 64, and a fixing ring 65. The bottom of the concave plate 61 is fixedly connected to one side of the top of the movable frame. The concave plate 61 is made of aluminum alloy, which has good wear resistance and corrosion resistance. One end of the plug plate 22 is inserted into the concave plate 61. One side of the frame 62 is fixedly connected to one side of the concave plate 61. Both the frame 62 and the concave plate 61 have moving holes to facilitate the movement of the plug rod 63. The outer side of the plug rod 63 is slidably connected to the inner wall of the moving hole. The spring 64 is sleeved on the plug rod 63. The fixing ring 65 is fixedly sleeved on the plug rod 63. One end of the spring 64 is fixedly connected to one side of the fixing ring 65, and the other end is fixedly connected to one side of the frame 62. One side of the plug plate 22 has a plug hole, and one end of the plug rod 63 is inserted into the plug hole to ensure the stability and reliability of the clamping plate 2 during the workpiece clamping process.

[0035] like Figure 3As shown, the feeding mechanism 7 includes a third hinge seat, a first hinge seat 72, a second hinge seat 73, and a first electric push rod 71. The bottom of the third hinge seat is fixedly connected to the bottom inner wall of the base 1. The third hinge seat is made of high-strength steel to ensure that the entire feeding mechanism maintains stability and reliability even after long-term use. One side of the first hinge seat 72 is fixedly connected to one side of the third hinge seat. The same rotating rod is rotatably installed on both inner walls of the third hinge seat. The rotating rod is made of alloy steel and has a connecting plate welded on it. The top of the connecting plate is fixedly connected to the bottom of the placement plate 3. The top of the second hinge seat 73 is fixedly connected to one bottom side of the placement plate 3. The fixed part of the first electric push rod 71 is hinged to the first hinge seat 72, and the telescopic part of the first electric push rod 71 is hinged to the second hinge seat 73 to ensure smooth operation and precise control during the feeding process.

[0036] like Figure 3 As shown, the inner walls on both sides of the base 1 are fixed with limiting plates 8 for horizontal positioning of the placement plate 3. The limiting plates 8 are made of stainless steel, which has high corrosion resistance and durability, and effectively prevents the placement plate 3 from horizontal displacement during use.

[0037] like Figure 1-2 As shown, the placement plate 3 is U-shaped, and multiple through holes 31 are opened on the top of the placement plate 3. The number and size of the through holes 31 are designed according to the actual processing requirements. The same moving plate 41 is slidably connected to the inner walls of both sides of the placement plate 3. Multiple U-shaped frames 42 are fixedly installed on the top of the moving plate 41. The U-shaped frames 42 are made of aluminum alloy material, which has good strength and corrosion resistance. The U-shaped frames 42 are located below the through holes 31. The inner wall of the U-shaped frames 42 is rotatably equipped with rollers 4 to reduce friction during material feeding. The rollers 4 are made of stainless steel material and have been surface treated to reduce the coefficient of friction, ensuring smooth sliding during material feeding and reducing damage to the workpiece.

[0038] like Figure 2 As shown, a second electric push rod for lifting and lowering the roller 4 is fixedly installed on the bottom inner wall of the placement plate 3. The second electric push rod is an SGP-120-12 electric push rod, which has high thrust and stable performance. The telescopic part of the second electric push rod is fixedly connected to the bottom of the moving plate 41, which can effectively control the lifting and lowering of the roller 4 and ensure that the roller 4 can be precisely adjusted to meet the unloading requirements under different workpieces and processing requirements.

[0039] Example 2: Precise clamping of the drive mechanism and clamping plate

[0040] This embodiment addresses the instability issue in traditional workpiece clamping by employing a high-precision electric drive system. Specifically, the drive mechanism 5 includes a 200W stepper motor 53 (model "XY-2000"), which works in conjunction with a bidirectional lead screw 52. Both ends of the bidirectional lead screw 52 are connected to the inner wall of the base 1 via bearings, ensuring smooth rotation of the lead screw. The output end of the stepper motor 53 is connected to one end of the bidirectional lead screw 52 via a precision coupling, driving two moving frames to slide along the inner wall of the base 1, ensuring precise clamping of the clamping plate 2. During the operation of the clamping plate 2, the lead screw nuts on the moving frames precisely control the clamping action of the clamping plate 2 through the transmission on both sides of the bidirectional lead screw 52, ​​keeping it in a precise position and avoiding the instability caused by traditional manual operation. Using this precision electric drive system, workpiece clamping or release can be completed within 10 seconds, greatly improving processing efficiency and clamping accuracy.

[0041] Example 3: Quick Replacement Function of Fixing Mechanism

[0042] This embodiment solves the problem that traditional workpiece clamps cannot quickly adapt to different workpiece shapes or sizes. The fixing mechanism 6 of this device includes a concave plate 61, a plug rod 63, and a spring 64. The plug rod 63 has an outer diameter of 12mm and an inner diameter of 9mm, and is made of high-strength stainless steel. The thread inside the plug rod tightly fits the plug hole on the plug plate 22, ensuring that the plug rod can be quickly and stably inserted into and lock the clamping plate 2. Springs 64 are respectively fitted at both ends of the plug rod 63, one end of which is connected to the fixing ring 65, and the other end is connected to the frame 62. The spring 64 is 30mm long and has a tension of 10N, which can provide sufficient restoring force. With this design, the operator can easily replace the clamping plate 2, making the clamping process adaptable to workpieces of various sizes and shapes. This design, through the fixed cooperation between the plug plate 22 and the clamping block 21, allows the clamping plate to be quickly replaced within 3 seconds, significantly improving the flexibility and production efficiency of the production line.

[0043] Example 4: Automated Control of the Feeding Mechanism

[0044] To improve material feeding efficiency, this embodiment features an optimized feeding mechanism, employing a first electric push rod 71 and a second electric push rod 72 for precise control. The first electric push rod 71, model "LKP-100," has a maximum thrust of 500N and can complete the pushing operation within 3 seconds. Connected to the hinge seat 73 of the feeding mechanism, the first electric push rod 71 precisely controls the tilt angle of the placement plate 3, allowing the workpiece to slide smoothly. During feeding, limit plates 8 are fixedly installed on the inner walls of both sides of the placement plate 3 to ensure that the placement plate does not undergo horizontal displacement, further improving feeding accuracy and stability. The placement plate 3 is made of aluminum alloy and undergoes anodizing treatment, resulting in increased surface hardness and wear resistance. Furthermore, the roller 4 mounted on the moving plate 41 is a 50mm diameter polyurethane roller, effectively reducing friction and ensuring smooth workpiece feeding. All actions during the feeding process are automatically coordinated by the controller; the operator only needs to set simple parameters, further improving production efficiency and automation.

[0045] Example 5: Precise Positioning and Stability of the Placement Plate

[0046] This embodiment addresses the problem of placement plate misalignment in traditional devices by designing an improved limiting plate 8. The limiting plate 8 is made of 8mm thick steel plate and is welded to the inner walls of both sides of the base 1 to ensure the placement plate 3 maintains a stable horizontal position during processing. By using precision sliding fittings, the coefficient of sliding friction between the placement plate 3 and the base is less than 0.2, reducing misalignment caused by friction. The placement plate 3 measures 300mm x 200mm, is made of aluminum alloy, and undergoes anodizing treatment, resulting in high hardness and strong corrosion resistance, ensuring stability and durability over long-term use. Furthermore, multiple through holes 31 are formed on the top of the placement plate 3, and the optimized hole spacing allows for better adaptation to the placement requirements of different workpieces. The design of the limiting plate 8 ensures that the placement plate remains horizontal throughout the entire operation, guaranteeing smooth material unloading.

[0047] Example 6: Automation and Control of the Overall System

[0048] This embodiment addresses the problems of cumbersome operation and low efficiency in traditional mechanical devices by employing a unified control system. This control system includes a controller, electric actuators, stepper motors, and an electric drive unit, enabling centralized control of all actions. The controller, model "GX-4000," features a touchscreen interface that displays system status and operating parameters in real time. After the operator inputs the required workpiece clamping, holding, and unloading parameters via the touchscreen, the system automatically executes the preset program to complete all steps. Through its integrated design, this system significantly reduces operator intervention and greatly improves clamping accuracy and work efficiency. In actual operation, the control system automatically adjusts the clamping force, unloading angle, and speed based on the input workpiece type, ensuring optimal results for each operation.

[0049] The working principle of this utility model is as follows: Before use, the clamping plate 2 that matches the workpiece is installed. The specific steps are as follows: Hold the clamping block 21 with one hand and insert the insert plate 22 into the concave plate 61. Pull the insert rod 63 with the other hand. The movement of the insert rod 63 compresses the spring 64, causing one end of the insert rod 63 to leave the moving hole of the concave plate 61. After the insert plate 22 is inserted into the concave plate 61, release the hand that pulled the insert rod 63. The spring 64 pushes the insert rod 63 into the insertion hole on the insert plate 22, thereby fixing the clamping plate 2 and making it easy to replace. Then, place the workpiece to be processed on the placement plate 3 on the base 1 and start the motor 53. After the motor 53 starts, it drives the two moving frames to move in opposite directions through the bidirectional lead screw 52. The concave plate 61 fixed on the moving frame moves accordingly, causing the clamping plate 2 to move closer to the workpiece, thereby clamping the workpiece. When it is necessary to unload, the output end of the motor 53 reverses, driving the clamping plate to release the clamping of the workpiece, and then starts the second... The second electric push rod has a telescopic part that drives the movement of the moving plate 41, U-shaped frame 42 and roller 4, so that the roller 4 is exposed through the through hole 31. The roller 4 lifts the workpiece and starts the first electric push rod 71 in the unloading mechanism 7. Its telescopic part drives the second hinge seat 73 (with the placement plate 3) to move (through the rotation of the third hinge seat), so that the placement plate 3 tilts and the workpiece on the placement plate 3 falls down along the roller, so that the workpiece can be unloaded. After the unloading is completed, the first electric push rod 71 retracts to restore the placement plate 3 to its initial position (the placement plate 3 is positioned by the limit plate 8 so that the placement plate 3 is flush with the base 1). The second electric push rod then stores the roller in the placement plate 3. The motor 53 can be a stepper motor, which can rotate in both directions. It should be noted that the motor 53, the first electric push rod 71 and the second electric push rod need to be controlled by an external controller and powered by an external power supply.

[0050] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A quick clamping device for workpieces in machining, comprising a base (1), characterized in that: The base (1) has mounting plates (11) welded to both sides of the bottom to facilitate the installation of the base (1). The base (1) is U-shaped and has a placement plate (3) for placing workpieces. The base (1) has two clamping plates (2) on its top for clamping the workpiece. The clamping plates (2) are composed of clamping blocks (21) and L-shaped insert plates (22). One side of the insert plate (22) is fixedly connected to one side of the clamping block (21). The base (1) is provided with a drive mechanism (5) on one side for driving the clamping plate (2) to clamp the workpiece. The base (1) is provided with a feeding mechanism (7) for feeding the workpiece. The top of the base (1) is provided with a fixing mechanism (6) for fixing the clamp (2).

2. The workpiece quick clamping device for machining according to claim 1, characterized in that: The drive mechanism (5) includes a box body (51), a bidirectional lead screw (52), a motor (53), and two movable frames. One side of the box body (51) is fixedly connected to one side of the base (1). The two ends of the bidirectional lead screw (52) are rotatably connected to the inner walls of both sides of the box body (51). One side of the motor (53) is fixedly connected to one side of the box body (51), and the output end passes through one side of the box body (51) and is fixedly connected to one end of the bidirectional lead screw (52). The movable frames are U-shaped, and one end of each movable frame is slidably connected to the inner wall of one side of the box body (51). A lead screw nut is embedded in one side of the movable frame, and the lead screw nut is threadedly connected to the bidirectional lead screw (52).

3. The workpiece quick clamping device for machining according to claim 2, characterized in that: The fixing mechanism (6) includes a concave plate (61), a plug rod (63), a frame (62), a spring (64), and a fixing ring (65). The bottom of the concave plate (61) is fixedly connected to one side of the top of the movable frame. One end of the plug plate (22) is inserted into the concave plate (61). One side of the frame (62) is fixedly connected to one side of the concave plate (61). Both the frame (62) and the concave plate (61) are provided with openings to facilitate the insertion of the plug rod (63). The movable hole is movable, the outer side of the insertion rod (63) is slidably connected to the inner wall of the movable hole, the spring (64) is sleeved on the insertion rod (63), the fixing ring (65) is fixedly sleeved on the insertion rod (63), one end of the spring (64) is fixedly connected to one side of the fixing ring (65), and the other end is fixedly connected to one side of the frame (62). The insertion plate (22) has an insertion hole on one side, and one end of the insertion rod (63) is inserted into the insertion hole.

4. The workpiece quick clamping device for machining according to claim 1, characterized in that: The feeding mechanism (7) includes a third hinge seat, a first hinge seat (72), a second hinge seat (73), and a first electric push rod (71). The bottom of the third hinge seat is fixedly connected to the bottom inner wall of the base (1). One side of the first hinge seat (72) is fixedly connected to one side of the third hinge seat. The same rotating rod is rotatably provided on both sides of the inner wall of the third hinge seat. A connecting plate is welded to one side of the rotating rod. The top of the connecting plate is fixedly connected to the bottom of the placement plate (3). The top of the second hinge seat (73) is fixedly connected to one side of the bottom of the placement plate (3). The fixed part of the first electric push rod (71) is hinged to the first hinge seat (72). The telescopic part of the first electric push rod (71) is hinged to the second hinge seat (73).

5. The workpiece quick clamping device for machining according to claim 1, characterized in that: The base (1) has two inner walls on which limiting plates (8) are fixedly installed for horizontal positioning of the placement plate (3).

6. The workpiece quick clamping device for machining according to claim 1, characterized in that: The placement plate (3) is U-shaped, and the top of the placement plate (3) is provided with multiple through holes (31). The inner walls of both sides of the placement plate (3) are slidably connected to the same moving plate (41). The top of the moving plate (41) is fixedly provided with multiple U-shaped frames (42). The U-shaped frames (42) are located below the through holes (31). The inner wall of the U-shaped frames (42) is rotatably provided with rollers (4) for reducing friction during material feeding.

7. The workpiece quick clamping device for machining according to claim 6, characterized in that: The bottom inner wall of the placement plate (3) is fixedly provided with a second electric push rod for lifting the roller (4), and the telescopic part of the second electric push rod is fixedly connected to the bottom of the moving plate (41).

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