A batch part machining fixture for machine tools

Abstract

A machine tool batch parts machining fixture relates to a machine tool accessory device, including a fixture base and a pneumatic mechanism. The fixture base includes an upper fixture pad, a fixture support, and a lower fixture pad, which are sequentially fixed from top to bottom. The upper fixture pad has a recessed groove. The pneumatic mechanism includes cylinders and pressure blocks. The cylinder body is installed in the middle of the recessed groove on the upper fixture pad, and the cylinder piston is connected to the pressure block. N cylinders are arranged side-by-side, corresponding to the pressure block and the inner side of the upper fixture pad, forming N clamping positions for holding the parts to be processed. This fixture can clamp a batch of parts to be processed on the same fixture, eliminating the need for multiple machine stops and allowing for the processing of multiple parts at once. It also enables rapid mold changes when processing parts of different specifications, significantly improving production efficiency.

Description

Technical Field

[0001] This utility model relates to a machine tool accessory device, and more particularly to a machine tool batch parts processing fixture. Background Technology

[0002] Currently, the fixtures used in CNC machine tools are generally single-station structures, capable of clamping and positioning only a single workpiece. Only one workpiece can be machined in a single machining cycle. When using this type of fixture, after each workpiece is machined, the machine must be stopped or the cutting tool removed, the machined workpiece unloaded, and the workpiece to be machined re-clamped before restarting or resetting the tool to continue machining. This cyclical operation mode not only has high labor costs but also low overall machining efficiency.

[0003] The existing fixtures have the following main defects: First, the structure is mainly designed for single-station operation. When processing batches, the clamping operation needs to be completed one piece at a time, which takes too long and cannot meet the needs of large-scale continuous and efficient production. Second, the connection structure between the various parts of the fixture is complex, the assembly process takes a long time, and it is inconvenient to change the fixture pads of different specifications. The fixtures have poor versatility and cannot meet the processing requirements of multi-variety and variable batch workpieces. Utility Model Content

[0004] The purpose of this invention is to provide a batch processing fixture for machine tools that can hold a batch of parts to be processed on the same fixture, so as to process multiple parts at one time without multiple machine stops. At the same time, it can also realize quick mold change when processing parts of different specifications, which greatly improves production efficiency.

[0005] The technical solution of this utility model is: a machine tool batch parts processing fixture, including a fixture base and a pneumatic mechanism, characterized in that: the fixture base includes an upper fixture pad, a fixture bracket, and a lower fixture pad, which are fixedly installed sequentially from top to bottom; the upper fixture pad is provided with a recessed groove; the pneumatic mechanism includes a cylinder and a pressure block; the cylinder body is installed in the middle of the recessed groove of the upper fixture pad; the cylinder piston is connected to the pressure block; N cylinders are arranged side by side, and the corresponding pressure block and the inner side of the upper fixture pad form multiple parts clamping positions for clamping the parts to be processed.

[0006] Furthermore, the aforementioned machine tool batch parts processing fixture is characterized in that: a quick-connect device is provided between the upper pad of the fixture and the fixture support.

[0007] A further described machine tool batch parts processing fixture is characterized in that: the quick-connect device includes a protrusion on the lower surface of the fixture upper pad and a groove and protrusion outlet at the corresponding part of the fixture bracket; the protrusion outlet is used for the fixture upper pad to separate from the fixture bracket and quickly retract; the fixture upper pad is provided with a locking through hole, and a screw hole is provided at the position of the fixture bracket corresponding to the locking through hole for fixing the fixture upper pad when it is installed on the fixture bracket. The quick-connect device structure realizes the quick connection and replacement of fixture upper pads of different specifications on the fixture bracket, thereby realizing the quick clamping of parts to be processed of different specifications.

[0008] A further described machine tool batch parts processing fixture is characterized in that: the upper pad of the fixture is provided with an upper pad left mold, an upper pad middle mold, and an upper pad right mold; the lower surfaces of the upper pad left mold, upper pad middle mold, and upper pad right mold are provided with protrusions on the same straight line; corresponding grooves and protrusion outlets are provided at the fixture support positions; the protrusion outlets are used for the upper pad left mold, upper pad middle mold, and upper pad right mold to separate from the fixture support and quickly retract; corresponding positioning pins are provided in the direction perpendicular to the grooves of the fixture support for positioning the upper pad left mold and upper pad right mold when they are installed on the fixture support; the upper pad middle mold is provided with a locking through hole; the locking through hole is provided with a screw hole at the position corresponding to the fixture support for fixing the upper pad middle mold when it is installed on the fixture support.

[0009] Furthermore, the aforementioned machine tool batch parts processing fixture is characterized in that: the lower groove surfaces of the upper pad plate left mold, upper pad plate middle mold, and upper pad plate right mold of the fixture are set with clamping shapes corresponding to the shape of the parts to be processed; the left and right sides of the upper pad plate middle mold are provided with N clamping shapes corresponding to the shape of the parts to be processed, and the number of these clamping shapes is equal to the number of clamping shapes set with the corresponding upper pad plate left mold and upper pad plate right mold.

[0010] A further described machine tool batch parts processing fixture is characterized in that: the fixture support is provided with three parallel concave surfaces, left, middle and right, and each concave surface is correspondingly equipped with an upper pad left mold, an upper pad middle mold, and an upper pad right mold. The fixture support is provided with a protrusion, the upper surface of which is flush with the lower groove surface of the upper pad left mold, upper pad middle mold, and upper pad right mold. A corresponding number of cylinders are installed on the upper surface of the fixture support protrusion between the upper pad left mold and the upper pad middle mold, and the pistons at both ends of the cylinders are connected to pressure blocks. Similarly, a corresponding number of cylinders are installed on the upper surface of the fixture support protrusion between the upper pad right mold and the upper pad middle mold, and the pistons at both ends of the cylinders are connected to pressure blocks. In use, the parts to be processed are placed between the pressure blocks and the upper pad left mold, the upper pad right mold, or the upper pad middle mold, to achieve simultaneous processing of a batch of parts.

[0011] A further described machine tool batch parts processing fixture is characterized in that: the fixture support and the fixture lower pad have through holes corresponding to the protrusion outlet positions of the upper pad left mold, upper pad middle mold, and upper pad right mold; a vertical cylinder or vertical hydraulic cylinder is provided on the machine tool frame at the corresponding through hole positions; the piston of the vertical cylinder or vertical hydraulic cylinder can pass through the through hole to push the protrusions of the upper pad left mold, upper pad middle mold, and upper pad right mold out from the protrusion outlet of the fixture support, thereby realizing the separation of the fixture upper pad from the fixture support, and thus realizing the rapid replacement of the fixture upper pad.

[0012] Furthermore, the aforementioned machine tool batch parts processing fixture is characterized in that: the protrusions on the lower surfaces of the upper pad left mold, upper pad middle mold, and upper pad right mold have trapezoidal cross-sections, and the corresponding grooves of the fixture bracket are set as trapezoidal grooves.

[0013] Furthermore, the aforementioned machine tool batch parts processing fixture is characterized by further including a transverse ejection mechanism, which is a transverse air cylinder or a transverse hydraulic cylinder. The cylinder body of the transverse air cylinder or the transverse hydraulic cylinder is mounted on the machine tool, and its position and height correspond to the groove of the fixture support, so as to enable the piston of the transverse air cylinder or the transverse hydraulic cylinder to extend into the groove, thereby realizing the transverse movement of the protrusion in the groove, and thus realizing the rapid entry / exit of the protrusion into the groove.

[0014] The correct sequence for changing the fixture during use is as follows: First, pull out the locking pin of the locking strip and remove the locking bolt. Then, start the transverse cylinder or transverse hydraulic cylinder installed on the machine tool. The piston of the transverse cylinder or transverse hydraulic cylinder extends and pushes the strip in the groove, moving the upper pad of the fixture until the entire strip on the upper pad is moved into the strip outlet. Next, start the vertical cylinder or vertical hydraulic cylinder at the corresponding through hole position on the machine tool frame. The piston of the vertical cylinder or vertical hydraulic cylinder extends from the through hole and lifts the upper pad of the fixture, detaching it from the fixture support. Then, remove the upper pad of the fixture. Next, move the new fixture upper pad to be replaced above the fixture bracket. Align the protrusion on the fixture upper pad with the protrusion outlet of the fixture bracket. Insert the fixture upper pad into the groove of the fixture bracket, and then move the fixture upper pad laterally until the protrusion enters the groove of the fixture bracket. Push it into place. Insert the locking bolt into the locking through hole of the fixture upper pad and screw the locking bolt into the corresponding screw hole of the fixture bracket. Install the pin and lock the protrusion with the pin. In this way, the whole process of replacing the fixture upper pad is completed.

[0015] The beneficial effects of this utility model are as follows: It provides a machine tool batch processing fixture with reasonable structure, precise positioning, efficient clamping, strong versatility, and high safety and reliability. By optimizing the fixture structure design, achieving rapid positioning of parts, and adding a quick-connect device, it realizes precise batch clamping of parts and quick fixture changes, improving processing efficiency and product consistency, while reducing operation difficulty and maintenance costs, and adapting to batch processing scenarios of various products. It is suitable for batch milling, drilling, and other processing operations of various small and medium-sized parts, and meets the general requirements of fixture design and batch production applicable standards in the mechanical manufacturing process equipment system. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a right-side perspective view of the structure of this utility model when a part to be processed is installed.

[0018] Figure 2 This is a left perspective perspective view of the clamp upper pad structure with cylinder installed in Embodiment 1 of this utility model.

[0019] Figure 3 This is a bottom perspective view of the upper pad of the clamp in Embodiment 1 of this utility model.

[0020] Figure 4 This is a top perspective view of the clamp support structure according to Embodiment 1 of this utility model.

[0021] Figure 5 This is a top perspective view of Embodiment 1 of this utility model.

[0022] Figure 6 This is a top view of the clamp bracket structure of Embodiment 2 of this utility model.

[0023] Figure 7 This is a left view of the clamp bracket structure of Embodiment 2 of this utility model.

[0024] Figure 8 This is a bottom view of Embodiment 2 of the present invention, showing the upper pad right mold, upper pad middle mold, and upper pad left mold arranged from top to bottom.

[0025] Figure 9 This is a top view of Embodiment 2 of the present invention, showing the upper pad left mold, upper pad middle mold, and upper pad right mold arranged from top to bottom.

[0026] In the diagram: 1. Part to be processed; 2. Pressure block; 3. Cylinder; 4. Locking through hole; 5. Upper pad of fixture; 5. Left mold of upper pad; 501. Middle mold of upper pad; 502. Right mold of upper pad; 503. Fixture bracket; 6. Lower pad of fixture; 7. Air inlet; 8. Air outlet; 9. Pin; 10. Protrusion; 11. Groove; 12. Lower groove; 13. Protrusion outlet; 14. Raise; 15. Lower groove surface; 16. Through hole; 17. Detailed Implementation

[0027] Example 1

[0028] The figure shows a machine tool batch parts processing fixture, including a fixture base and a pneumatic mechanism. The fixture base includes an upper fixture pad 5, a fixture support 6, and a lower fixture pad 7. The upper fixture pad 5, the fixture support 6, and the lower fixture pad 7 are fixedly installed from top to bottom. The upper fixture pad 5 is provided with a recessed groove 13. The pneumatic mechanism includes a cylinder 3 and a pressure block 2. The cylinder body of the cylinder 3 is installed in the middle of the recessed groove 13 of the upper fixture pad 5. The piston of the cylinder 3 is connected to the pressure block 2. N cylinders 3 are arranged side by side, and the pressure block 2 and the inner side of the upper fixture pad 5 form N clamping positions for clamping the parts 1 to be processed.

[0029] A quick-connection device is provided between the upper pad 5 of the fixture and the fixture bracket 6. The quick-connection device includes a protrusion 11 on the lower surface of the upper pad 5 and a corresponding groove 12 and a protrusion outlet 14 on the corresponding part of the fixture bracket 6; the protrusion outlet 14 is used for the upper pad 5 of the fixture to be separated from the fixture bracket 6 and quickly withdrawn; the upper pad 5 of the fixture is provided with a locking through hole 4, and the locking through hole 4 is provided with a screw hole at the position of the fixture bracket 6 for fixing the upper pad 5 of the fixture when it is installed on the fixture bracket 6.

[0030] Example 2

[0031] A machine tool batch parts processing fixture, based on Embodiment 1, has an upper pad plate 5 equipped with an upper pad plate left mold 501, an upper pad plate middle mold 502, and an upper pad plate right mold 503. The lower surfaces of the upper pad plate left mold 501, upper pad plate middle mold 502, and upper pad plate right mold 503 are provided with protrusions 11. Correspondingly, the fixture support 6 is provided with a groove 12 and a protrusion outlet 14. The protrusion outlet 14 is used for the upper pad plate left mold 501, upper pad plate middle mold 502, and upper pad plate right mold 503 to separate from the fixture support 6 and quickly retract. A corresponding positioning pin 10 is provided on the fixture support 6 in the direction perpendicular to the protrusion outlet 14 for positioning the upper pad plate left mold 501 and upper pad plate right mold 503 when fixed on the fixture support 6. The upper pad plate middle mold 502 is provided with a locking through hole 4, and the locking through hole 4 is provided with a screw hole at the position corresponding to the fixture support 6 for fixing the upper pad plate middle mold 502 when installed on the fixture support 6.

[0032] The upper pad 5 of the fixture has an inner side of the left mold 501 and the right mold 503 of the upper pad 5 set with a shape corresponding to the shape of the part to be processed. The left and right sides of the middle mold 502 of the upper pad are provided with N shapes corresponding to the shape of the part to be processed, the number of which is equal to the number of shapes corresponding to the shape of the part to be processed set on the inner side of the left mold 501 and the right mold 503 of the upper pad 503. The fixture bracket 6 is provided with three parallel concave surfaces: left, middle, and right. The left mold 501, the middle mold 502, and the right mold 503 of the upper pad are installed on each concave surface. The fixture bracket 6 is provided with a protrusion 15, the upper surface of which is... The upper pad left mold 501, upper pad middle mold 502, and upper pad right mold 503 are set at the same height as the groove surface 16. A corresponding number of cylinders 3 are set on the clamping bracket 6 between the upper pad left mold 501 and the upper pad middle mold 502. The pistons of the cylinders 3 are connected to the pressure blocks 2. Similarly, a corresponding number of cylinders 3 are set between the upper pad right mold 503 and the upper pad middle mold 502. The pistons of the cylinders 3 are connected to the pressure blocks 2. When in use, the parts to be processed are placed between the pressure blocks 2 and the upper pad left mold 501, the upper pad right mold 503 or the upper pad middle mold 502, so as to realize the simultaneous processing of a batch of parts to be processed. The fixture bracket 6 and the fixture lower pad 7 have through holes 17 at the protrusion outlet 14 positions of the upper pad left mold 501, upper pad middle mold 502, and upper pad right mold 503. The machine tool frame is equipped with a cylinder or hydraulic cylinder at the corresponding through hole 17 position to push the protrusions 11 of the upper pad left mold 501, upper pad middle mold 502, and upper pad right mold 503 out of the protrusion outlet 14 of the fixture bracket 6, thereby realizing the separation of the fixture upper pad 5 from the fixture bracket 6 and thus realizing the quick replacement of the fixture upper pad 5.

[0033] Example 3

[0034] A batch parts processing fixture for machine tools, based on Embodiment 2, wherein the lower surface protrusions 11 of the upper pad left mold 501, upper pad middle mold 502, and upper pad right mold 503 have trapezoidal cross-sections, and the corresponding grooves 12 of the fixture bracket 6 are configured as trapezoidal grooves. It also includes a transverse ejection mechanism, which is a transverse air cylinder or a transverse hydraulic cylinder. The cylinder body of the transverse air cylinder or transverse hydraulic cylinder is mounted on the machine tool, with its position and height corresponding to the groove 12 on the fixture bracket 6, so that the piston of the transverse air cylinder or transverse hydraulic cylinder can penetrate deeply into the groove 12, thereby realizing the transverse movement of the protrusions 11 in the groove 12, and thus enabling the rapid entry / exit of the protrusions 11 into / out of the groove 12.

[0035] The replacement sequence for the fixture during use is as follows: First, pull out the locking pin 10 of the locking strip, remove the locking bolt, and start the transverse cylinder or transverse hydraulic cylinder installed on the machine tool. The piston of the transverse cylinder or transverse hydraulic cylinder extends and pushes the protrusion 11 in the groove 12, causing the fixture upper pad 5 to move as a whole until the protrusion of the fixture upper pad 5 moves into the protrusion outlet 14. Then, start the vertical cylinder or vertical hydraulic cylinder at the corresponding through hole position on the machine tool frame. The piston of the vertical cylinder or vertical hydraulic cylinder extends from the through hole and lifts the fixture upper pad 5 as a whole, disengaging it from the fixture bracket 6. Remove the fixture upper pad 5, and then... Move the new fixture upper pad 5 to be replaced above the fixture bracket 6. Align the protrusion 11 on the fixture upper pad 5 with the protrusion outlet 14 of the fixture bracket 6. Insert the fixture upper pad 5 into the fixture bracket 6, and then move the fixture upper pad 5 laterally so that the protrusion 11 enters the groove 12 of the fixture bracket 6 until it is pushed into place. Install the locking bolt at the locking through hole 4 of the fixture upper pad 5 and the corresponding position of the fixture bracket 6, and install the pin 10. The pin 10 locks the protrusion 11. In this way, the entire process of replacing the fixture upper pad is completed.

Claims

1. A machine tool batch parts machining fixture, comprising a fixture base and a pneumatic mechanism, characterized in that: The fixture base includes an upper fixture pad, a fixture bracket, and a lower fixture pad. The upper fixture pad, fixture bracket, and lower fixture pad are fixedly installed in sequence from top to bottom. The upper fixture pad is provided with a recessed groove. The pneumatic mechanism includes a cylinder and a pressure block. The cylinder body is installed in the middle of the recessed groove of the upper fixture pad. The cylinder piston is connected to the pressure block. N cylinders are arranged side by side, and the corresponding pressure block and the inner side of the upper fixture pad form N clamping spaces for clamping the parts to be processed.

2. A machine tool batch parts machining fixture according to claim 1, characterized in that: A quick-connection device is provided between the upper pad of the fixture and the fixture bracket and the lower pad of the fixture.

3. A machine tool batch parts machining fixture according to claim 2, characterized in that: The quick-connect device includes a protrusion on the lower surface of the upper pad of the fixture and a groove and protrusion outlet at the corresponding part of the fixture bracket; the protrusion outlet is used for the upper pad of the fixture to separate from the fixture bracket and quickly retract; the upper pad of the fixture is provided with a locking through hole, and a screw hole is provided at the position of the locking through hole on the fixture bracket for fixing the upper pad of the fixture when it is installed on the fixture bracket.

4. A machine tool batch parts machining fixture according to claim 1, characterized in that: The fixture upper pad is provided with an upper pad left mold, an upper pad middle mold, and an upper pad right mold. The lower surfaces of the upper pad left mold, upper pad middle mold, and upper pad right mold are provided with protrusions. Corresponding grooves and protrusion outlets are provided at the fixture bracket positions. The protrusion outlets are used for the upper pad left mold, upper pad middle mold, and upper pad right mold to separate from the fixture bracket and quickly retract. A corresponding positioning pin is provided in the direction perpendicular to the groove of the fixture bracket for positioning the upper pad left mold and upper pad right mold when they are installed on the fixture bracket. The upper pad middle mold is provided with a locking through hole. The locking through hole is provided with a screw hole at the position corresponding to the fixture bracket for fixing the upper pad middle mold when it is installed on the fixture bracket.

5. A machine tool batch parts machining fixture according to claim 4, characterized in that: The upper pad plate left mold, upper pad plate middle mold, and upper pad plate right mold of the fixture are configured with the recessed groove sides corresponding to the shape of the part to be processed. The upper pad plate middle mold has N sides corresponding to the shape of the part to be processed on its left and right sides, and the number of these sides is equal to the number of sides corresponding to the upper pad plate left mold and upper pad plate right mold.

6. A machine tool batch parts machining fixture according to claim 4, characterized in that: The fixture bracket has three parallel concave surfaces: left, middle, and right. Each concave surface is equipped with the left mold, middle mold, and right mold of the upper pad plate. The fixture bracket has a protrusion, the upper surface of which is flush with the lower groove surface of the left mold, middle mold, and right mold of the upper pad plate. A corresponding number of cylinders are installed on the upper surface of the protrusion of the fixture bracket between the left mold and the middle mold of the upper pad plate. The pistons at both ends of the cylinders are connected to pressure blocks. Similarly, a corresponding number of cylinders are installed on the upper surface of the protrusion of the fixture bracket between the right mold and the middle mold of the upper pad plate. The pistons at both ends of the cylinders are connected to pressure blocks.

7. A machine tool batch parts machining fixture according to claim 4, characterized in that: The fixture bracket and the lower fixture pad have through holes corresponding to the protrusion outlet positions of the upper pad left mold, upper pad middle mold, and upper pad right mold. A vertical cylinder or vertical hydraulic cylinder is provided on the machine tool frame at the corresponding through hole position. The piston of the vertical cylinder or vertical hydraulic cylinder can pass through the through hole to push the protrusions of the upper pad left mold, upper pad middle mold, and upper pad right mold out of the protrusion outlet of the fixture bracket.

8. A machine tool batch parts machining fixture according to any one of claims 4-7, characterized in that: The protruding strips on the lower surfaces of the upper pad left mold, upper pad middle mold, and upper pad right mold are trapezoidal in cross-section, and the corresponding grooves of the fixture bracket are set as trapezoidal grooves.

9. A machine tool batch parts machining fixture according to claim 8, characterized in that: It also includes a transverse ejection mechanism, which is a transverse air cylinder or a transverse hydraulic cylinder. The cylinder body of the transverse air cylinder or the transverse hydraulic cylinder is mounted on the machine tool, and its position and height correspond to the groove of the fixture support. It is advisable to enable the piston of the transverse air cylinder or the transverse hydraulic cylinder to extend into the groove, so as to realize the transverse movement of the protrusion in the groove, thereby realizing the rapid entry / exit of the protrusion into the groove.

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