Multi-station numerical control milling clamp

Abstract

The utility model discloses a multi-station numerical control milling processing clamp which comprises a mounting base, a linkage unit, a power unit and a plurality of clamp bodies, the linkage unit, the power unit and the plurality of clamp bodies are all arranged on the mounting base, the power unit is connected with the plurality of clamp bodies through the linkage unit, and the power unit is connected with the plurality of clamp bodies through the linkage unit. Each clamp body comprises two clamping jaws which are symmetrically arranged, one end of each clamping jaw is a wedge-shaped part, and a channel is formed between the wedge-shaped parts of the two clamping jaws in the same group; a retraction spring is arranged between the two clamping jaws, and when the two clamping jaws are opened, the retraction spring is in a stretched state. According to the clamp, linkage of the multiple clamp bodies is achieved, the machining efficiency can be effectively improved, loosening or clamping of the clamping jaws within a certain range is achieved through cooperation of the rolling wheels and the wedge-shaped limiting blocks, tensioning is achieved through the retraction springs, clamping is stable and reliable, the clamp is suitable for milling machining of revolving body type parts of different specifications, overall operation is simple, and the machining efficiency is high. And an operator can process and use conveniently.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, specifically to a multi-station CNC milling machining fixture. Background Technology

[0002] With the continuous development of modern industrial technology, CNC milling machines are widely used in the field of machining, gradually replacing traditional ordinary milling machines. Their high efficiency, high precision, and high workpiece adaptability have brought about tremendous changes in traditional machining. While CNC machining processes and fixtures share many similarities with ordinary machining, CNC machining also has certain unique characteristics. These differences must be considered when performing CNC machining, and the fixture issues must be addressed simultaneously.

[0003] Workpiece clamping is crucial in CNC machining. Before clamping and positioning the workpiece, a certain amount of time must be used for adjustment. If the workpiece clamping and positioning is inaccurate, difficulties will be encountered during the machining process, and it may even lead to the scrapping of the workpiece. Therefore, in order to ensure the quality of workpiece machining, the production process not only needs to use machine tools and a large number of process equipment, but also needs to design a variety of machining fixtures.

[0004] Existing CNC milling fixtures mostly clamp single workpieces, resulting in limited applicability and low production efficiency. While some multi-station fixtures exist, their clamping bodies are relatively independent, requiring workpieces to be installed one by one. This makes it difficult to meet production schedules when mass-producing workpieces. Therefore, it is essential to design an automatically clamping multi-station CNC milling fixture. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a multi-station CNC milling fixture that is widely applicable, can clamp multiple parts at once, improves part processing efficiency, is easy to operate, and has high processing accuracy. The fixture transmits power to each station through a positive and negative lead screw and nut mechanism, achieving the goal of clamping multiple parts at once, ensuring the processing accuracy and quality of the parts, and improving processing efficiency.

[0006] Specifically, this utility model provides a multi-station CNC milling fixture, comprising:

[0007] Mounting base;

[0008] Multiple clamp bodies are mounted on a mounting base, and each clamp body includes two symmetrically arranged grippers;

[0009] The linkage unit connects to multiple fixture bodies to enable all fixture bodies to move synchronously.

[0010] A power unit, connected to the linkage unit, is used to drive all the clamp bodies to open and close together;

[0011] One end of each gripper is a wedge-shaped portion, and a channel is formed between the wedge-shaped portions of two grippers in the same group; a retraction spring is provided between the two grippers, and the retraction spring is in a stretched state when the two grippers are opened.

[0012] The linkage unit includes:

[0013] Several sets of sliding members are connected by a linkage assembly; the sliding members are configured to move along the channel, and the sliding members squeeze the wedge-shaped part to drive the two grippers to open and release the workpiece.

[0014] Furthermore, the power unit includes: a forward and reverse threaded screw;

[0015] The linkage component is a linkage seat, which is mounted on the positive and negative threaded rods. When the positive and negative threaded rods rotate, they drive the linkage seat to move axially.

[0016] Furthermore, the sliding member is connected to the linkage seat via a connecting plate. An axial guide rail is provided below the connecting plate. The axial guide rail is arranged parallel to the axial direction of the positive and negative threaded rods. The linkage seat drives the connecting plate to move along the axial guide rail.

[0017] Furthermore, each set of the sliders includes:

[0018] Two vertically arranged rollers, each corresponding to a wedge-shaped portion of a gripper.

[0019] Furthermore, the clamp body also includes:

[0020] A base plate is mounted on a mounting base, and the axial guide rail is mounted on the base plate;

[0021] A transverse guide rail is arranged perpendicular to the axis, and the gripper is slidably connected to the transverse guide rail.

[0022] Furthermore, a handwheel is provided at the end of the positive and negative threaded screw.

[0023] Furthermore, a workpiece placement platform for placing workpieces is provided below the gripper.

[0024] The working principle of this utility model:

[0025] When clamping the workpiece, rotating the forward and reverse threaded screws causes the linkage seat to move the connecting plate and its rollers backward, disengaging them from the wedge-shaped part of the grippers. The two grippers then move closer together under the action of the return spring, clamping the workpiece. To release the workpiece, rotating the forward and reverse threaded screws causes the linkage seat to move the rollers towards the grippers, pressing against the wedge-shaped part. This, in turn, pushes the grippers along the transverse guide rail, causing the two grippers to open and release the workpiece. At this point, the return spring is in a stretched state.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] (1) The multi-station CNC milling fixture provided by this utility model realizes the synchronous opening and closing of multiple fixtures through one drive, which can effectively improve the processing efficiency.

[0028] (2) The gripper can be loosened or clamped within a certain range by the cooperation of the roller and the wedge-shaped limit block. The clamping is stable and reliable by the pull-back spring. It is suitable for milling of rotating parts of different specifications. It has a wide range of applications, simple overall operation, and is convenient for operators to process and use. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the multi-station CNC milling fixture in Example 1;

[0030] Figure 2 This is a top view of the multi-station CNC milling fixture in Example 1;

[0031] Figure 3 This is a schematic diagram of the fixture body in Example 1;

[0032] Figure 4 This is a schematic diagram showing the usage status of the multi-station CNC milling fixture in Example 1.

[0033] Figure label:

[0034] 1-Mounting base; 2-Clamp body; 21-Base plate; 22-Claw; 221-Wedge-shaped part; 23-Return spring; 24-Axial guide rail; 25-Transverse guide rail; 26-Workpiece placement table; 3-Positive and negative threaded rods; 31-Handwheel; 32-Bearing seat; 41-Linkage seat; 42-Connecting plate; 43-Roller; 5-Workpiece; 6-Machine tool spindle. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0036] Example 1

[0037] like Figure 1-2As shown, this embodiment provides a multi-station CNC milling fixture, including: a mounting base 1, a power unit, a linkage unit, and multiple fixture bodies 2. The power unit, linkage unit, and multiple fixture bodies 2 are all mounted on the mounting base 1. The power unit acts as a drive to open and close the fixture bodies 2, and the linkage unit acts as a transmission to drive the multiple fixture bodies 2 to move synchronously. The power unit is a forward and reverse threaded screw 31, which is mounted on the mounting base 1 through bearing seats 32 at both ends. In this embodiment, the end of the forward and reverse threaded screw 31 is a handwheel 31, which can be used to rotate the forward and reverse threaded screw 31. Alternatively, the forward and reverse threaded screw 31 can be driven by a motor, which is not limited here. The linkage unit is connected to the positive and negative threaded rods 31 and includes: a linkage seat 41 and several sets of sliding parts. There are two linkage seats 41, which are respectively connected to the two ends of the positive and negative threaded rods 31 through nuts. Connecting plates 42 are installed at both ends of the linkage seat 41. Each connecting plate 42 is provided with a set of sliding parts. The connecting plate 42 is slidably connected to the clamp body 2. By rotating the positive and negative threaded rods 31, the linkage seat 41 can be driven to move axially, thereby driving the connecting plate 42 to slide.

[0038] The fixture body 2 is configured with 4 sets, such as Figure 3 As shown, each fixture body 2 includes: a base plate 21, an axial guide rail 24, a transverse guide rail 25, a return spring 23, and two grippers 22. The base plate 21 is L-shaped and serves as a basic support. The axial guide rail 24 is arranged parallel to the positive and negative threaded rods 31. A connecting plate 42 is slidably connected to the axial guide rail 24. The end of the axial guide rail 24 is fixed with a guide rail end stop by an internal hexagon screw to limit the connecting plate 42 and prevent it from detaching from the axial guide rail 24. The transverse guide rail 25 is arranged perpendicular to the axial guide rail 24. The two grippers 22 are slidably connected to the transverse guide rail 25, and a return spring 23 is installed between them. The two grippers 22 move along the transverse guide rail 25 to open or close the fixture body 2. Specifically, below the gripping end of the gripper 22 is a workpiece placement platform 26 for placing the workpiece 5. The end of the gripper 22 near the connecting plate 42 is a wedge-shaped part 221, and the wedge-shaped parts 221 of the two grippers 22 are symmetrically arranged. The sliding component is a roller 43, of which two are provided. The two rollers 43 are fixed to the left and right sides of the connecting plate 42 respectively. When the connecting plate 42 moves towards the gripper 22, the rollers 43 press the wedge-shaped part 221 outward through the wedge-shaped part 221, causing the gripper 22 to open. At this time, the return spring 23 is in a stretched state. When the connecting plate 42 moves away from the gripper 22, the rollers 43 disengage from the wedge-shaped part 221, and the gripper 22 clamps the workpiece 5 under the contraction action of the return spring 23.

[0039] The usage process of this utility model is as follows:

[0040] Step 1: Place the machining fixture flat on the CNC machine tool worktable, use a lever dial indicator to align the vertical edges and planes, and press the pressure plate to tighten the four sides of the mounting base 1.

[0041] Step 2: Rotate the handwheel 31 clockwise to drive the positive and negative threaded rods 3 to rotate, causing the two linkage seats 41 to move closer together along the axis, thereby driving the connecting plate 42 on the fixture body 2 of each workstation to move along the axial guide rail 24, causing the two sets of rollers 43 to squeeze the two wedge-shaped parts 221, thereby driving the jaws 22 on multiple fixture bodies 2 to open simultaneously.

[0042] Step 3: Place the workpieces 5 to be processed on the workpiece placement tables 26 of the multiple fixture bodies 2.

[0043] Step 4: Rotate the handwheel 31 counterclockwise to drive the forward and reverse threaded rods 3 to rotate, causing the two linkage seats 41 to move away axially, thereby driving the connecting plates 42 on the fixture body 2 of each workstation to move, causing the two sets of rollers 43 to disengage from the two wedge-shaped parts 221, the return spring 23 to contract, and pull the two grippers 22 to tighten and clamp the workpiece 5 to be processed.

[0044] Step 5: As Figure 4 As shown, start the CNC machine tool, move the machine tool spindle 6 to run the CNC program to process the workpieces 5 one by one.

[0045] Step Six: After machining, move the machine tool spindle 6 to a safe height position, rotate the handwheel 31 clockwise to drive the positive and negative threaded rods 3 to rotate, so that the two linkage seats 41 move closer along the axis, thereby driving the connecting plate 42 on the fixture body 2 of each station to move along the axial guide rail 24, so that the two sets of rollers 43 squeeze the two wedge-shaped parts 221, thereby driving the jaws 22 on multiple fixture bodies 2 to open simultaneously, and manually remove the machined workpiece.

[0046] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A multi-station CNC milling fixture, comprising a mounting base (1) and a plurality of fixture bodies (2) disposed on the mounting base (1), each fixture body (2) comprising two symmetrically arranged grippers (22); characterized in that, Also includes: The linkage unit is connected to multiple clamp bodies (2) so that all clamp bodies (2) move synchronously; A power unit, connected to the linkage unit, is used to drive all the clamp bodies (2) to open and close together; One end of the gripper (22) is a wedge-shaped part (221), and a channel is formed between the wedge-shaped parts (221) of the two grippers (22) in the same group; a retraction spring (23) is provided between the two grippers, and the retraction spring (23) is in a stretched state when the two grippers (22) are opened; The linkage unit includes: Several sets of sliding members are connected by a linkage assembly; the sliding members are configured to move along the channel, and the sliding members squeeze the wedge (221) to drive the two grippers (22) to open and release the workpiece.

2. The multi-station CNC milling fixture as described in claim 1, characterized in that, The power unit includes: a forward and reverse threaded screw (3); The linkage component is a linkage seat (41), which is mounted on the positive and negative threaded rod (3). When the positive and negative threaded rod (3) rotates, it drives the linkage seat (41) to move axially.

3. The multi-station CNC milling fixture as described in claim 2, characterized in that, The sliding member is connected to the linkage seat (41) via the connecting plate (42). A axial guide rail (24) is provided below the connecting plate (42). The axial guide rail (24) is arranged parallel to the axial direction of the positive and negative threaded rod (3). The linkage seat (41) drives the connecting plate (42) to move along the axial guide rail (24).

4. The multi-station CNC milling fixture as described in claim 2 or 3, characterized in that, Each set of sliders includes: Two vertically arranged rollers (43) are respectively positioned to correspond to the wedge-shaped portions (221) of two grippers (22).

5. The multi-station CNC milling fixture as described in claim 3, characterized in that, The clamp body (2) also includes: The base plate (21) is mounted on the mounting base (1), and the axial guide rail (24) is mounted on the base plate (21); A transverse guide rail (25) is arranged perpendicular to the axial guide rail (24), and the gripper (22) is slidably connected to the transverse guide rail (25).

6. The multi-station CNC milling fixture as described in claim 2, characterized in that, The end of the positive and negative threaded screw (3) is provided with a handwheel (31).

7. The multi-station CNC milling fixture as described in claim 1, characterized in that, Below the gripper (22) is a workpiece placement platform (26) for placing the workpiece (5).

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