Milling machining clamping unit and milling machining jig

Abstract

The utility model discloses a milling machining clamping unit and a milling machining jig. The milling machining clamping unit comprises a fixing base, a connecting sleeve, an expansion core, an expansion chuck and a first driving piece. The connecting sleeve is embedded in the fixed seat; the tensioning chuck is connected with the connecting sleeve and is provided with a plurality of clamping petals capable of being opened and closed; the expansion core is movably connected with the connecting sleeve, and the upper portion of the expansion core is of a big-end-down cone structure. The output end of the first driving piece penetrates through the connecting sleeve and is connected with the expansion core, and the first driving piece can drive the expansion core to abut against the tensioning chuck so as to open the clamping flaps. Automatic clamping and loosening are achieved, clamping force is automatically controlled, repeated clamping force is uniform, clamping and positioning precision is improved, productivity is improved, the reject ratio is reduced, and therefore machining cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of milling processing, in particular to a milling processing clamping unit and a milling processing jig. Background Art

[0002] When milling workpieces such as internal gear rings, a clamping fixture is currently used to hold the workpiece's outer diameter, position it with an auxiliary block, and then manually tighten the workpiece. Due to uneven manual tightening force, excessive tightening often results in the workpiece being clamped too tightly and deformed, while insufficient tightening force often prevents the workpiece from being clamped tightly enough. This can cause the workpiece to loosen during machining, ultimately resulting in defective and scrapped products, low product qualification rates, and high machining costs. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a milling processing clamping unit and a milling processing jig. The clamping method uses a support instead of a clamp to automatically control the clamping force, achieving uniform and stable repeated clamping force. It can also automatically and quickly clamp and position the workpiece, improve the repeatable positioning accuracy of the workpiece clamping, and reduce the defect rate and processing costs.

[0004] On the one hand, an embodiment of the present invention provides a milling processing clamping unit, comprising a fixed seat, a connecting sleeve, an expanding core, a tightening chuck and a first driving member. The connecting sleeve is embedded in the fixed seat. The tightening chuck is connected to the connecting sleeve, and the tightening chuck is provided with a plurality of openable and closable clamping petals. The expanding core is movably connected to the connecting sleeve, and the upper part of the expanding core is a conical structure with a small upper part and a large lower part. The output end of the first driving member is provided in the connecting sleeve and is connected to the expanding core, and can drive the expanding core to abut against the tightening chuck to open the clamping petals.

[0005] According to some embodiments of the present invention, the connecting sleeve includes a chassis and a plurality of limiting columns, and the plurality of limiting columns are evenly distributed on the circumference of the chassis to form a limiting space.

[0006] According to some embodiments of the present invention, the expanding core is provided with a groove, the expanding core is movably embedded in the limiting space, and the groove is sleeved with the limiting column.

[0007] According to some embodiments of the present invention, the fixing seat is provided with a through hole, and the connecting sleeve is embedded in the through hole.

[0008] According to some embodiments of the present invention, the tensioning chuck is covered with a dust cover.

[0009] On the other hand, an embodiment of the present invention provides a milling tool, comprising the above-mentioned milling clamping unit and a base, wherein the milling clamping unit is installed on the base.

[0010] According to some embodiments of the present invention, the base includes a bottom plate, a vertical plate and a base plate, the vertical plate is vertically connected to the bottom plate, and the base plate is installed on the vertical plate.

[0011] According to some embodiments of the present invention, there are multiple milling processing clamping units, and the multiple milling processing clamping units are distributed in a queue on the base plate.

[0012] According to some embodiments of the present invention, a positioning member and a second driving member are installed on the substrate, the positioning member is connected to the output end of the second driving member, and the positioning member is provided with a plurality of positioning grooves.

[0013] According to some embodiments of the present invention, the first driving member is an oil cylinder, an oil pipe connecting block is provided on the bottom plate, the oil pipe connecting block is provided with an oil pipe joint, and the oil pipe connecting block is connected to the oil cylinder.

[0014] The embodiments of the present invention have at least the following beneficial effects:

[0015] The above-mentioned milling processing clamping unit includes a fixed seat, a connecting sleeve, an expanding core, a tensioning chuck and a first driving member. The expanding core is movably connected to the connecting sleeve, and the upper part of the expanding core is a conical structure with a small top and a large bottom. The tensioning chuck is provided with a plurality of opening and closing clamping petals. The output end of the first driving member is passed through the connecting sleeve and is connected to the expanding core, and can drive the expanding core to abut against the tensioning chuck to open the clamping petals. When the first driving member drives the expanding core to move upward, since the upper part of the expanding core is a conical structure with a small top and a large bottom, an expansion force is generated on the tensioning chuck during the rising process, thereby opening the tensioning chuck. After opening, the tensioning chuck forms a strong and stable clamping for the workpiece. When the first driving member drives the expanding core to move downward, the tensioning chuck loses the squeeze from the expanding core, thereby shrinking to restore its original shape, and the tensioning chuck releases the workpiece. The clamping method of using support instead of clamping is adopted to realize automatic clamping and relaxation, automatic control of clamping force, achieve uniform repeated clamping force, improve clamping and positioning accuracy, increase productivity, reduce defective rate, and thus reduce processing costs.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a structural diagram of a milling processing clamping unit according to an embodiment of the present utility model;

[0019] Figure 2 for Figure 1 The cross-sectional structural diagram of the milling processing clamping unit AA is shown;

[0020] Figure 3 for Figure 2 The schematic structural diagram of the connecting sleeve of the milling clamping unit is shown;

[0021] Figure 4 for Figure 2 The schematic diagram of the structure of the core expansion of the milling processing clamping unit is shown;

[0022] Figure 5 for Figure 2 A schematic structural diagram of a clamping chuck of a milling processing clamping unit is shown;

[0023] Figure 6 This is a schematic structural diagram of a milling tool according to an embodiment of the present invention;

[0024] Figure 7 for Figure 6 The schematic diagram of the top view of the milling jig shown;

[0025] Figure 8 for Figure 6 The schematic diagram of the structure of the positioning part of the milling processing fixture is shown.

[0026] Reference numerals:

[0027] Base 100, bottom plate 110, vertical plate 120, base plate 130, baffle 140, oil pipe connecting block 150, handle 160, connecting sleeve 210, chassis 211, limiting column 212, expansion core 220, groove 221, tightening chuck 230, fixing seat 240, first driving member 250, through hole 241, dust cover 232, positioning member 310, positioning groove 311, second driving member 320, workpiece 400. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of this utility model, "several" means one or more, "multiple" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, and "above," "below," and "within" are understood to include the number itself. The use of terms such as "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly indicating the number or order of the technical features indicated.

[0031] In the description of the present invention, unless otherwise clearly defined, words such as “set,” “install,” “connect,” and “connected” should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above words in the present invention based on the specific content of the technical solution.

[0032] Please refer to Figures 1 to 3 This embodiment discloses a milling clamping unit, comprising a fixed base 240, a connecting sleeve 210, an expanding core 220, a tensioning chuck 230, and a first driving member 250. The connecting sleeve 210 is embedded in the fixed base 240; the tensioning chuck 230 is connected to the connecting sleeve 210 and is provided with a plurality of openable and closable clamping petals 231; the expanding core 220 is movably connected to the connecting sleeve 210, and the upper portion of the expanding core 220 is a conical structure with a smaller upper portion and a larger lower portion; the output end of the first driving member 250 is disposed through the connecting sleeve 210 and connected to the expanding core 220, and is capable of driving the expanding core 220 to abut against the tensioning chuck 230 to open the clamping petals 231. When the first driving member 250 drives the expanding core 220 upward, the upward movement of the expanding core 220, due to its conical structure with a narrow top and a wide bottom, generates an expansion force on the tensioning chuck 230, thereby expanding the tensioning chuck 230. The expanded tensioning chuck 230 then secures the workpiece 400 with a strong and stable grip. When the first driving member 250 drives the expanding core 220 downward, the tensioning chuck 230 loses the pressure from the expanding core 220 and contracts to restore its original shape, releasing the workpiece 400. This achieves automatic clamping and loosening, automatically controlling the clamping force, ensuring uniform, repeatable clamping force, improving clamping and positioning accuracy, increasing productivity, and reducing defect rates, thereby lowering processing costs.

[0033] Please refer to Figure 3The connecting sleeve 210 includes a chassis 211 and a plurality of limiting posts 212, which are evenly distributed around the chassis 211 to form a limiting space. The expansion core 220 moves up and down within the limiting space along the limiting posts 212, causing the tensioning chuck 230 to expand or contract, thereby clamping or releasing the workpiece 400. It should be noted that the chassis 211 is provided with a circular hole to facilitate the output end of the first driving member 250 to pass through the chassis 211 and connect to the expansion core 220.

[0034] Please refer to Figure 3 and Figure 4 The expanding core 220 is provided with a groove 221. The expanding core 220 is movably embedded in the limiting space, and the groove 221 is engaged with the limiting post 212. The size of the groove 221 matches the size of the limiting post 212. When the first driving member 250 drives the expanding core 220 upward, the expanding core 220 moves along the limiting post 212 through the groove 221. During the upward movement, the expanding core 220 generates an expansion force on the tensioning chuck 230, thereby expanding the tensioning chuck 230. After expansion, the tensioning chuck 230 forms a strong and stable clamping force on the workpiece 400.

[0035] Please refer to Figure 1 and Figure 3 The fixing base 240 is provided with a through hole 241, and the connecting sleeve 210 is embedded in the through hole 241. The expansion core 220 is connected to the output end of the first driving member 250. The first driving member 250 drives the expansion core 220 to move up and down, thereby expanding or contracting the tensioning chuck 230, thereby clamping or releasing the workpiece 400.

[0036] Please refer to Figure 1 and Figure 5 The tensioning chuck 230 is covered with a dust cover 232 to prevent dust or debris from falling into the gap between the two clamping petals 231, thereby ensuring the clamping positioning accuracy.

[0037] Please refer to Figure 6 This embodiment further provides a milling tool, comprising the above-mentioned milling clamping unit and a base 100 , wherein the milling clamping unit is mounted on the base 100 .

[0038] Please refer to Figure 6 and Figure 7 The base 100 includes a bottom plate 110, a vertical plate 120, and a base plate 130. The vertical plate 120 is perpendicularly connected to the bottom plate 110, and the base plate 130 is mounted on the vertical plate 120. Specifically, there are two vertical plates 120, which are parallel to each other. A baffle 140 is installed between the two vertical plates 120 and is arranged perpendicular to the bottom plate. The vertical plate 120 supports the base plate 130, so that the milling clamping unit can be mounted on the base plate 130.

[0039] Please refer to Figure 6 and Figure 7 The number of the milling processing clamping units is multiple, and the multiple milling processing clamping units are distributed in a queue on the base plate 110. It can clamp multiple workpieces 400 at the same time, realize multi-station simultaneous processing, and improve processing efficiency.

[0040] Please refer to Figure 6 and Figure 8 A positioning member 310 and a second driving member 320 are mounted on the substrate 130. The positioning member 310 is connected to the output end of the second driving member 320. The positioning member 310 is provided with a plurality of positioning slots 311. Specifically, the positioning member 310 can be a plate-shaped, rod-shaped or block-shaped structure.

[0041] It should be noted that the first driving member 320 is an oil cylinder or an air cylinder, and the second driving member 320 is a linear bearing or an air cylinder.

[0042] Please refer to Figure 6 and Figure 7 The first driving member 250 is a hydraulic cylinder. A hydraulic pipe connector 150 is mounted on the base plate 110. This connector 150 is equipped with a hydraulic pipe joint 151, which connects to the hydraulic cylinder. The milling fixture is connected to an external hydraulic station via the hydraulic pipe joint 151, enabling automatic clamping and release of the workpiece 400.

[0043] Please refer to Figure 6 and Figure 7 Handles 160 are provided on both sides of the base 100 to facilitate grabbing and moving operations, thereby improving work efficiency and safety.

[0044] During use, the workpiece 400 to be processed is connected to an external oil station via the oil pipe connector 111, and the workpiece 400 to be processed is placed on the tensioning chuck 230. The jig is activated, and the second driving member 320 drives the positioning member 310 to move onto the workpiece 400, aligning the positioning slot 311 with the top of the workpiece 400. The first driving member 250 then drives the expanding core 220 upward. Because the expanding core 220 has a conical structure with a narrow top and a large bottom, the upward movement exerts an expansion force on the tensioning chuck 230, thereby expanding the expanding chuck 230. Once expanded, the expanding chuck 230 secures the workpiece 400 with a strong and stable grip. After processing, the first driving member 250 drives the expanding core 220 downward. Losing the compression from the expanding core 220, the tensioning chuck 230 contracts to return to its original shape, releasing the workpiece 400. The second driving member 320 then returns the positioning member 310 to its original position, allowing the processed workpiece 400 to be removed. A clamping method using support instead of clamping is adopted to achieve automatic clamping and loosening. The clamping force is automatically controlled by the first driving member 250 to achieve uniform repeated clamping force and high stability, improve clamping positioning accuracy, increase productivity, reduce defective rate, and thus reduce processing costs.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A milling clamping unit, characterized in that: include: A fixing seat (240), wherein the fixing seat (240) is provided with a through hole (241); A connecting sleeve (210), the connecting sleeve (210) being embedded in the through hole (241), the connecting sleeve (210) comprising a base plate (211) and a plurality of limiting posts (212), the plurality of limiting posts (212) being evenly distributed on the base plate (211) to form a limiting space; A tensioning chuck (230), the tensioning chuck (230) being connected to the connecting sleeve (210), the tensioning chuck (230) being provided with a plurality of openable and closable clamping petals (231); An expanding core (220), the expanding core (220) is movably connected to the connecting sleeve (210), the upper portion of the expanding core (220) is a conical structure with a small upper portion and a large lower portion, the expanding core (220) is provided with a groove (221), the expanding core (220) is movably embedded in the limiting space, and the groove (221) is sleeved with the limiting column (212); A first driving member (250), wherein an output end of the first driving member (250) is passed through the connecting sleeve (210) and is connected to the expansion core (220), and is capable of driving the expansion core (220) to abut against the tensioning clamp (230) to open the clamping flap (231).

2. The milling clamping unit according to claim 1, characterized in that: The tensioning chuck (230) is covered with a dust cover (232).

3. A milling tool, characterized in that: It comprises the milling clamping unit and the base (100) according to any one of claims 1 to 2.

4. The milling tool according to claim 3, characterized in that: The base (100) comprises a bottom plate (110), a vertical plate (120) and a base plate (130), wherein the vertical plate (120) is vertically connected to the bottom plate (110), and the base plate (130) is mounted on the vertical plate (120).

5. The milling tool according to claim 4, characterized in that: There are multiple milling processing clamping units, and the multiple milling processing clamping units are distributed in a queue on the base plate (110).

6. The milling tool according to claim 4, characterized in that: A positioning member (310) and a second driving member (320) are mounted on the base plate (130), the positioning member (310) is connected to an output end of the second driving member (320), and the positioning member (310) is provided with a plurality of positioning slots (311).

7. The milling tool according to claim 4, 5 or 6, characterized in that: The first driving member (250) is an oil cylinder. An oil pipe connecting block (150) is provided on the base plate (110). The oil pipe connecting block (150) is provided with an oil pipe joint (151). The oil pipe connecting block (150) is connected to the oil cylinder.

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