Numerical control milling clamp with automatic feeding function

Abstract

The utility model discloses an automatic feeding numerical control milling clamp which comprises a clamp body, a clamping mechanism, a stock bin and a feeding mechanism, and the clamping mechanism is arranged on one side of the clamp body and is configured to move towards / away from a workpiece on the clamp body; the stock bin is located at one end of the clamp body, and the feeding mechanism is located at the end, away from the clamp body, of the stock bin and used for feeding workpieces in the stock bin to a machining station of the clamp body in the axial direction. The numerical control milling clamp with the automatic feeding function has the automatic feeding and clamping functions, is reasonable in structural design and easy to operate, shortens machine tool equipment downtime and manual material changing time, and can remarkably improve machining efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, and particularly relates to a numerically controlled milling fixture with automatic feeding. Background Art

[0002] With the development of the modern scientific and technological level, as an advanced manufacturing technology, numerical control processing technology, and the numerical control milling method is widely used in the field of mechanical processing technology. The positioning and clamping of workpieces are particularly important in numerical control milling processing. The traditional milling processing method takes a lot of time to align the workpiece, and the clamping and positioning of the workpiece determine whether the processing can be carried out efficiently and smoothly, whether there will be a phenomenon of out-of-tolerance dimensional accuracy, and whether the economic benefits of the enterprise can be improved. At present, when numerically controlling the milling processing of workpieces, the workpieces to be processed are often positioned and clamped through tooling fixtures, and the design of the tooling fixtures has a direct impact on the processing efficiency, production cost, and processing quality.

[0003] The processing fixtures in the prior art are mainly manual feeding fixtures, and the next workpiece to be processed is replaced by manual feeding. Manual replacement and clamping of workpieces take a certain amount of time, resulting in the numerical control milling machine being in a standby state and affecting the milling processing efficiency of workpieces.

[0004] Based on this, a fixture that can realize automatic feeding and automatic clamping of workpieces is needed. Summary of the Utility Model

[0005] Aiming at the problems that the applicable range of the existing numerically controlled milling fixtures is small, and when a large number of workpieces need to be processed, the taking out, feeding, positioning and clamping of workpieces take a lot of time, resulting in low processing efficiency, the utility model provides an automatic feeding numerically controlled milling processing fixture with a simple structure, a wide applicable range and high processing efficiency.

[0006] Specifically, the utility model provides a numerically controlled milling fixture with automatic feeding, including:

[0007] A fixture body;

[0008] A clamping mechanism, arranged on one side of the fixture body and configured to move towards / away from the workpiece on the fixture body;

[0009] A magazine, located at one end of the fixture body;

[0010] A feeding mechanism, located at the end of the magazine far away from the fixture body, and used for axially feeding the workpieces in the magazine onto the processing station of the fixture body.

[0011] Further, the feeding mechanism includes:

[0012] A feeding driving part;

[0013] The feeding push rod is connected to the feeding driving part, and the feeding driving part drives the feeding push rod to push forward, so as to axially feed the workpiece in the material bin into the processing station of the fixture body.

[0014] Further, the clamping mechanism includes:

[0015] A clamping driving part;

[0016] A pressing plate is connected to the clamping driving part, and the clamping driving part drives the pressing plate to clamp or loosen the workpiece.

[0017] Further, the clamping driving part is a clamping cylinder. The output end of the clamping cylinder is hinged to one end of the pressing plate away from the fixture body. A support seat is arranged below the pressing plate. The pressing plate is connected to the support seat through a connecting rod. Both ends of the connecting rod are respectively hinged to the pressing plate and the support seat;

[0018] When the piston rod of the clamping cylinder extends, it drives the pressing plate to clamp the workpiece;

[0019] When the piston rod of the clamping cylinder retracts, it drives the pressing plate to loosen the workpiece.

[0020] Further, a positioning mechanism is arranged at one end of the fixture body away from the material bin. The positioning mechanism is used for positioning and buffering the workpiece fed into the fixture body.

[0021] Further, the positioning mechanism includes:

[0022] A positioning seat is arranged at one end of the fixture body away from the material bin, and the positioning seat is configured to be height-adjustable;

[0023] A connecting piece is connected to the positioning seat and is configured to be adjustable in the axial position of the workpiece;

[0024] A positioning head is connected to the connecting piece through an elastic member. During use, the positioning head abuts against the end of the workpiece.

[0025] Further, a positioning shaft is arranged at one end of the connecting piece away from the positioning head. The positioning shaft passes through the positioning seat, and a handle is installed on it. The elastic member is a spring, which is sleeved on the positioning shaft, and the spring is located between the connecting piece and the positioning seat.

[0026] Further, a positioning slot arranged axially is provided on the upper part of the positioning shaft. The locking screw penetrates into the positioning slot from the top end of the positioning seat to determine the position of the connecting piece.

[0027] Further, the bottom end of the locking screw is a ball head, and the positioning slot is a semi-circular slot adapted to the ball head.

[0028] Furthermore, the fixture body is a two-station fixture body, the magazine is provided with a two-station storage chamber, and the feeding push rod is of a U-shaped structure and is used for simultaneously pushing two workpieces in the two-station storage chamber onto the two stations of the fixture body.

[0029] Working principle:

[0030] The workpiece 8 is stored in the magazine 3. When machining is required, the feeding driving member drives the feeding push rod 22 to push forward, and pushes the workpiece 8 from the magazine 3 onto the station of the fixture body 7. Since the workpiece 8 moves forward with a certain speed, a positioning mechanism is arranged at the end of the fixture body 7 away from the magazine to position and buffer the workpiece 8 fed into the fixture body 7, so as to ensure the accuracy of the position of the workpiece 8 and relieve the impact force of the workpiece 8 during feeding, and protect the workpiece 8 and the positioning mechanism. After the workpiece 8 is in place, the piston rod of the clamping cylinder 41 pushes upward, driving the parallelogram mechanism composed of the pressing plate 44 and the connecting rod 43 to act, so that the pressing plate 44 moves from the upper side to the workpiece 8 and finally presses the workpiece 8 tightly. After the machining is completed, the piston rod of the clamping cylinder 41 retracts, driving the pressing plate 44 to reset, and the machined workpiece 8 can be taken out manually.

[0031] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0032] (1) The automatic feeding numerical control milling fixture provided by the present utility model has the functions of automatic feeding and clamping, with reasonable structural design and simple operation, shortening the downtime of machine tool equipment and the manual material changing time, and can significantly improve the processing efficiency.

[0033] (2) By positioning through the positioning seat, positioning head and the fixture body, the accurate positioning of the workpiece can be ensured, and by clamping the workpiece through the clamping mechanism, the movement of the workpiece during machining can be avoided.

[0034] (3) The positions of the positioning seat and the positioning head are adjustable, which can be suitable for the positioning and feeding of workpieces with different diameters, and has a wide application range to meet the clamping of workpieces of different specifications. Description of the drawings

[0035] Figure 1 It is a schematic diagram of the use state of the numerical control milling fixture with automatic feeding in Embodiment 1;

[0036] Figure 2 It is a left-side state diagram when taking the workpiece of the numerical control milling fixture with automatic feeding in Embodiment 1;

[0037] Figure 3 It is a right-side state diagram when taking the workpiece of the numerical control milling fixture with automatic feeding in Embodiment 1;

[0038] Figure 4 It is an exploded view of the positioning mechanism in Embodiment 1.

[0039] Reference numerals:

[0040] 1 - Base; 2 - Mounting base; 21 - Feeding cylinder; 22 - Feeding push rod; 3 - Magazine; 31 - Storage baffle; 41 - Clamping cylinder; 42 - Support base; 43 - Connecting rod; 44 - Pressing plate; 5 - Positioning base; 51 - Kidney-shaped hole; 61 - Positioning head; 62 - Connecting piece; 63 - Positioning shaft; 64 - Spring; 65 - Positioning slot; 66 - Handle; 67 - Locking screw; 7 - Jig body; 8 - Workpiece; 9 - Machine tool spindle. Detailed implementation manners

[0041] The present utility model will be further described in detail below in conjunction with the accompanying drawings through specific implementation manners.

[0042] Embodiment 1

[0043] As Figures 1-3 shown, this embodiment provides a numerically controlled milling fixture with automatic feeding. This fixture adopts a double-station structure and can simultaneously realize the pushing and clamping of two workpieces, thereby improving the processing efficiency. Specifically, the numerically controlled milling fixture with automatic feeding includes: a base 1, a jig body 7, a positioning mechanism, a clamping mechanism, a magazine 3, and a feeding mechanism arranged on the base 1. The jig body 7 is a V-shaped jig body, and the V-shaped structure is the working station. The V-shaped structure has a self-centering function and can be applicable to workpieces 8 with different diameters, while improving the clamping accuracy of the workpiece. The jig body 7 is fixed on the base 1 through four groups of bolts. The base 1 is placed flat on the working surface of the numerically controlled milling machine, and the entire fixture can be fixed by pressing the base 1 with a pressing plate. Multiple groups of grooves are opened on the mounting surface of the base 1 to facilitate the flow of cutting fluid during the processing. The magazine 3 is located at one end of the jig body 7 close to the feeding mechanism. The workpiece 8 stored in the magazine 3 is sent to the working station of the jig body 7 through the feeding mechanism, and the clamping mechanism clamps the workpiece 8 sent to the working station, and the processing is carried out by the machine tool spindle 9.

[0044] Specifically, the feeding mechanism includes a feeding cylinder 21 and a feeding push rod 22. The feeding cylinder 21 is fixed on the base 1 through a mounting base 1. It uses pneumatic drive as the power source. The feeding cylinder 21 reciprocates and extends to send the workpiece 8 to be processed from the magazine 3 to the working station area of the jig body 7 through the feeding push rod 22. The feeding push rod 22 is designed as a U-shaped structure to meet the double-station feeding of the workpiece. The magazine 3 is composed of two groups of storage baffles 31. A storage chamber is formed between the two storage baffles 31 in each group, thus forming a double-station storage chamber. The storage baffles 31 are fixed on the V-shaped jig body 7 through hexagon socket head cap screws. The mounting holes are designed as kidney-shaped holes along the longitudinal direction and can be adjusted longitudinally within a certain range to meet the storage of workpieces 8 to be processed with different diameters. Reinforcing ribs are welded on the outer side of the storage baffles 31 to increase the overall strength.

[0045] The clamping mechanism includes: a clamping cylinder 41 and a pressing plate 44. The clamping cylinder 41 is fixed on the base 1. The top end of the piston rod of the clamping cylinder 41 is hinged to one end of the pressing plate 44. The pressing plate 44 is designed as a double-step tooth-shaped structure, which can meet the simultaneous pressing or pressure relief of the workpiece at two workstations. The pressing plate 44 is hinged to the support seat 42 through two groups of connecting rods 43. The connecting rods 43 form two groups of parallelogram mechanisms. The clamping cylinder 41 drives the pressing plate 44 to clamp or release the workpiece 8 to be processed. The two ends of the connecting rod 43 are respectively hinged to the support seat 42 and the pressing plate 44 by rotating screws. One end of the rotating screw is designed as a plum blossom groove structure, which is convenient for installation and disassembly.

[0046] Further, as Figure 4 shown, the positioning mechanism includes: a positioning seat 5, a connecting piece 62 and a positioning head 61. The positioning seat 5 is fixed on the fixture body 7 by hexagon socket head cap screws. Its mounting hole position is designed as a waist-shaped hole 51, so as to realize the adjustment of the height, so that the positioning head 61 on the positioning seat 5 can be located on the axis. The positioning head 61 is fixed to one end of the connecting piece 62 close to the workstation. One end of the connecting piece 62 close to the positioning seat 5 is a positioning shaft 63. The bottom of the positioning shaft 63 is designed as a flat structure. A positioning slot 65 is arranged axially on the upper part. The bottom end of the locking screw 67 is a ball head. The positioning slot 65 is a semi-circular slot adapted to the ball head for the locking screw 67 to clamp. The axial position of the connecting piece 62 and the positioning head 61 can be fixed by the locking screw 67. A handle 66 is arranged at one end of the positioning shaft 63 passing through the positioning seat 45, so as to facilitate the movement of the positioning shaft 63. A buffer spring 64 is arranged at the root of the U-shaped structure of the connecting piece 62. The spring 64 is sleeved on the positioning shaft 63. The impact of the workpiece 8 on the positioning head 64 during feeding can be mitigated by the spring 64.

[0047] Specifically, the use process of this fixture is as follows:

[0048] Step 1: Connect the air source, start the feeding cylinder 21, retract the feeding push rod 22 to the original position, adjust the storage baffle 31 in the storage chamber to a suitable longitudinal position according to the outer diameter size of the workpiece 8 to be processed, and place the workpiece 8 to be processed into the double-station storage chamber.

[0049] Step 2: According to the outer diameter size of the workpiece 8 to be processed and the processing technical requirements, ensure the positioning accuracy of the fixture, adjust the connecting piece 62 and the positioning head 61 to a suitable position in the axial direction, then tighten the locking screw 67 until the positioning slot 65 of the positioning shaft 63 is locked, adjust the positioning seat 5 to a suitable position in the vertical direction, and tighten the hexagon socket head cap screws to fix.

[0050] Step 3: Connect the air source, start the clamping cylinder 41, and retract the pressing plate 44 to the original position.

[0051] Step 4: Start the feeding cylinder 21, extend the feeding push rod 22 to send the workpiece 8 to be processed in the double-station storage chamber to the area of the workpiece to be processed on the fixture 7, and abut against the positioning head 61. At the same time, start the clamping cylinder 41, extend the piston rod to drive the pressure plate 44 to clamp the workpiece 8 to be processed through two sets of parallelogram mechanisms.

[0052] Step 5: Start the CNC milling machine, move the machine tool spindle 9 to run the CNC program to perform double-station processing on the workpiece 8 to be processed.

[0053] Step 6: After the processing is completed, move the machine tool spindle 9 to the safe height position. At the same time, start the clamping cylinder 41 to retract the pressure plate 44 to its original position, and manually take out the finished workpiece 8 from the fixture 7.

[0054] Step 7: Repeat the above steps 4 to 6 to complete the processing of subsequent workpieces.

[0055] The above uses specific examples to elaborate on the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the technical field to which the present invention pertains, based on the idea of the present invention, several simple deductions, deformations or substitutions can also be made.

Claims

1. A numerically controlled milling fixture with automatic feeding, characterized in that, Comprising: Jig body (7); A clamping mechanism, provided on one side of the jig body (7) and configured to move towards / away from the workpiece (8) on the jig body (7); A magazine (3), located at one end of the jig body (7); A feeding mechanism, located at the end of the magazine (3) away from the jig body (7), for axially feeding the workpiece (8) in the magazine (3) onto the machining station of the jig body (7).

2. The numerically controlled milling fixture with automatic feeding according to claim 1, wherein The feeding mechanism includes: A feeding driving part; A feeding push rod (22), connected to the feeding driving part, and the feeding driving part drives the feeding push rod (22) to push forward, axially feeding the workpiece (8) in the magazine (3) onto the machining station of the jig body (7).

3. The numerically controlled milling fixture with automatic feeding according to claim 1, wherein The clamping mechanism includes: A clamping driving part; A pressing plate (44), connected to the clamping driving part, and the clamping driving part drives the pressing plate (44) to clamp or release the workpiece (8).

4. The numerically controlled milling fixture with automatic feeding according to claim 3, characterized in that, The clamping driving part is a clamping cylinder (41), the output end of the clamping cylinder (41) is hinged to one end of the pressing plate (44) away from the jig body (7), a support seat (42) is provided below the pressing plate (44), the pressing plate (44) is connected to the support seat (42) through a connecting rod (43), and both ends of the connecting rod (43) are respectively hinged to the pressing plate (44) and the support seat (42); When the piston rod of the clamping cylinder (41) extends, it drives the pressing plate (44) to clamp the workpiece (8); When the piston rod of the clamping cylinder (41) retracts, it drives the pressing plate (44) to release the workpiece (8).

5. The numerically controlled milling fixture with automatic feeding according to any one of claims 1-4, characterized in that, A positioning mechanism is provided at one end of the jig body (7) away from the magazine (3), and the positioning mechanism is used to position and buffer the workpiece (8) fed into the jig body (7).

6. The numerically controlled milling fixture with automatic feeding according to claim 5, characterized in that, The positioning mechanism includes: A positioning seat (5), provided at one end of the jig body (7) away from the magazine (3), and the positioning seat (5) is configured to be height-adjustable; A connecting part (62), connected to the positioning seat (5) and configured to be axially position-adjustable along the workpiece (8); A positioning head (61), connected to the connecting part (62) through an elastic member, and when in use, the positioning head (61) abuts against the end of the workpiece (8).

7. The numerically controlled milling fixture with automatic feeding according to claim 6, characterized in that, A positioning shaft (63) is provided at one end of the connecting part (62) away from the positioning head (61), the positioning shaft (63) passes through the positioning seat (5), and a handle (66) is installed thereon. The elastic member is a spring (64), which is sleeved on the positioning shaft (63), and the spring (64) is located between the connecting part (62) and the positioning seat (5).

8. The numerically controlled milling fixture with automatic feeding according to claim 7, characterized in that, A positioning card slot (65) arranged axially is provided on the upper part of the positioning shaft (63), and a locking screw (67) penetrates into the positioning card slot (65) from the top end of the positioning seat (5) to determine the position of the connecting part (62).

9. The numerically controlled milling fixture with automatic feeding according to claim 8, characterized in that, The bottom end of the locking screw (67) is a ball head, and the positioning card slot (65) is a semi-circular card slot adapted to the ball head.

10. The numerically controlled milling fixture with automatic feeding according to claim 2, characterized in that, The jig body (7) is a double-station jig body, the magazine (3) is a double-station storage chamber, and the feeding push rod (22) is of a U-shaped structure for simultaneously pushing two workpieces (8) in the double-station storage chamber onto the two stations of the jig body (7).

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