A quick clamping combined tool for multi-station machining of shaft end base

Abstract

The utility model discloses a quick clamping combination tool for axle end base multistation processing, including lathe carousel subassembly, cross tetrahedron structure stand column subassembly, clamping groove positioning subassembly and movable rotary positioning subassembly, cross tetrahedron structure stand column subassembly includes the cross tetrahedron structure main part of the stand column subassembly, and the stand column subassembly includes facade board and the symmetric setting back side board, and both sides of facade board are equipped with at least two pairs of U groove symmetry, and the fixed nut in U groove is used for installing locking groove screw, clamping groove positioning subassembly includes V type positioning block, and the upper end of V type positioning block is equipped with V type gap, and the both sides are provided with a plurality of spring plunger respectively and are used for adjusting the clearance between both ends by abutting the inner side of axle end base, movable rotary positioning subassembly includes vertical quick clamp, and the vertical quick clamp sets up clamp support and is connected in the upper end of stand column subassembly, and the anvil of vertical quick clamp is connected with the preparation movable presser. Can improve the clamping efficiency, guarantee the machining accuracy and reduce the labor intensity.

Description

Technical Field

[0001] This utility model belongs to the technical field of shaft end base machining, and particularly relates to a quick clamping assembly tooling for multi-station machining of shaft end bases. Background Technology

[0002] In the machining of shaft end bases, traditional machining methods suffer from inefficiencies, inaccuracies, and redundant actions. This has become the background reason for developing rapid clamping fixtures, mainly reflected in the following aspects: 1. Cumbersome process flow: A workpiece is processed in four steps, which consumes a lot of machine tool resources and involves frequent process flow during machining; 2. Low clamping efficiency: Shaft end bases usually require machining multiple stations (such as side, bottom hole, deep hole, thread, etc.). In traditional machining, each station often needs to be clamped separately, and each clamping requires re-tool setting and calibration, which is cumbersome, consumes a lot of auxiliary time, and leads to low production efficiency, making it difficult to meet the needs of mass production; 3. Poor positioning accuracy: During multiple clamping processes, the positioning datum may deviate each time, which can easily lead to cumulative errors, affecting the machining accuracy of the workpiece. This makes it difficult to guarantee the dimensional and geometric tolerances between stations, reducing the product qualification rate; 4. High labor intensity: Frequent clamping operations require operators to repeatedly adjust the workpiece and tighten the fixture, which not only increases the workload but may also further affect the machining quality and efficiency due to improper human operation. Therefore, there is an urgent need to develop a quick clamping fixture that can realize multi-station machining of shaft end bases in order to improve clamping efficiency, ensure machining accuracy and reduce labor intensity. Utility Model Content

[0003] To address the problems of requiring a large number of personnel, high labor intensity, and excessive equipment resources in the machining of shaft end bases for batch production, as well as frequent process transfers, low production efficiency, high manufacturing costs, and poor processing consistency, this utility model provides a quick clamping assembly tooling for multi-station machining of shaft end bases.

[0004] This utility model is achieved by the following technical solution: a quick clamping assembly tooling for multi-station machining of shaft end base, including a machine tool turntable assembly, a cross tetrahedral structure column assembly, a slot positioning assembly and a movable rotary positioning assembly; The machine tool turntable assembly includes a machine tool turntable with T-slots spaced apart on it. A rotary positioning mandrel is located at the center of the turntable. The cross tetrahedral structure column assembly includes a cross tetrahedral structure body with a frame structure. The cross tetrahedral structure body is composed of four vertical column assemblies forming a cross tetrahedral structure. The cross tetrahedral structure body is fixed to a base plate. The base plate is positioned by the rotary positioning mandrel and installed on the machine tool turntable with T-bolts. The column assembly includes a vertical panel and symmetrically arranged rear side panels. At least two pairs of U-slots are symmetrically arranged on both sides of the vertical panel. The fixing nuts in the U-slots are used to install locking groove screws to press against the side of the shaft end base. The slot positioning assembly is installed on the lower part of the vertical panel, including a V-shaped positioning block for positioning the lower side of the shaft end base. The upper end of the V-shaped positioning block has a V-shaped notch for engaging the cylindrical surface of the central cylinder of the shaft end base. Multiple spring plungers are provided on both sides to abut against the inner side of the shaft end base to adjust the gap between the two ends. The lower part of the V-shaped positioning block protrudes towards the vertical panel and has a mounting part that connects to the vertical panel. The V-shaped positioning block has a through hole that passes through the mounting part. The vertical panel has a corresponding threaded hole. The upper side of the shaft end base is pressed by a screwed tensioning screw, a locking nut, and a quick-change pressure plate. The movable rotary positioning assembly includes a vertical quick clamp. The vertical quick clamp is equipped with a clamp support connected to the upper end of the column assembly. The pressure head of the vertical quick clamp is connected to a movable pressure block for quick positioning of the shaft end base on the baseline. A U-groove is left at the upper part of the vertical panel. The rear end of the movable pressure block is provided with a boss that fits tightly with the U-groove when pressed.

[0005] Furthermore, the rotary positioning spindle is positioned by a cylindrical pin and locked to the machine tool turntable by fastening screws.

[0006] Furthermore, the vertical panel is provided with machining clearance holes at the drilling positions on the bottom surface of the shaft end base.

[0007] Furthermore, a rectangular hole is provided at the bottom of the rear side plate for draining cutting fluid and iron filings during the machining process.

[0008] Furthermore, the clamp support includes a T-shaped horizontal plate and a vertical plate. The horizontal plate has threaded holes at both ends and is installed between the rear side plates on both sides by fastening screws. The vertical plate is fixedly connected to the vertical quick clamp.

[0009] Furthermore, the upper sides of the mounting part of the V-shaped positioning block are provided with chamfers to avoid the U-shaped position of the shaft end base.

[0010] Furthermore, the contact surface between the lower end of the movable pressure block and the shaft end base is configured as an inclined surface that matches the draft angle of the shaft end base blank surface.

[0011] Compared with the prior art, this utility model has the following advantages: Quick-clamping fixtures can be rapidly and accurately installed in place during the clamping process, simultaneously clamping and securing themselves to the machining fixture. A single clamping operation can complete all machining tasks at each station, reducing multi-process transfers and clamping movements. This enables precise workpiece assembly and rapid positioning, effectively reducing manufacturing costs, significantly improving production efficiency, and alleviating labor intensity. The quick-clamping mechanism also provides forced constraint during machining, preventing deformation and displacement, ensuring high positioning accuracy, and thus guaranteeing product quality and precision. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the structure of the machine tool turntable assembly of this utility model; Figure 4 This is a structural schematic diagram of the cross-shaped tetrahedral column assembly of this utility model; Figure 5 This is a schematic diagram of the card slot positioning component of this utility model; Figure 6 This is a schematic diagram of the structure of the movable rotary positioning component of this utility model; Figure 7 This is a schematic diagram of the structure of the shaft end base of this utility model.

[0013] In the diagram: 1-Machine tool turntable assembly, 1.1-Machine tool rotary table, 1.2-Rotary positioning spindle, 1.3-φ10 cylindrical pin, 1.4-M12 fastening screw; 2-Cross tetrahedral structure column assembly, 2.1-Base plate, 2.2-T-bolt, 2.3-Adjusting washer, 2.4-Locking nut I, 2.5-Locking nut II, 2.6-Locking grooved screw, 2.7-Fixing weldable nut, 2.8-Hex socket head cap screw; 3-Slot positioning assembly, 3.1-V-type positioning block, 3.2-SPH8-3 standard spring plunger, 3.3-Tightening screw, 3.4-Locking nut, 3.5-Quick-change pressure plate, 3.6-Cylindrical pin, 3.7-Fasting screw; 4-Modible rotary positioning assembly, 4.1-Configuration movable pressure block, 4.2-CH-701-K vertical quick clamp, 4.3-Clamp support; 5-Shaft end base, 5.1-Oblong hole on the side, 5.2-Bottom 4-φ13.1 hole, 5.3-Both sides, 5.4-Cylindrical deep hole. Detailed Implementation

[0014] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0015] like Figures 1-2 As shown in the figure, this embodiment provides a quick clamping assembly tooling for multi-station machining of shaft end bases, used for batch machining of shaft end bases 5, including a machine tool turntable assembly 1, a cross tetrahedral structure column assembly 2, a slot positioning assembly 3, and a movable rotary positioning assembly 4.

[0016] like Figure 3 As shown, the machine tool turntable assembly 1 includes a machine tool turntable 1.1. T-slots are spaced apart on the turntable 1.1. A rotary positioning mandrel 1.2 is located at the center of the turntable 1.1, which can be used for repeated installation to ensure precise positioning of the components. The rotary positioning mandrel 1.2 has chamfered edges for quick installation. The rotary positioning mandrel 1.2 is precisely positioned to the turntable 1.1 via a cylindrical pin, ensuring that the rotary positioning mandrel 1.2 is at the exact center of the turntable 1.1. Specifically, the rotary positioning mandrel 1.2 has pin holes and screw holes. The pin holes are machined to ensure assembly accuracy, and the screw holes are countersunk to avoid contact with the bottom surface when installing the cross-shaped tetrahedral column assembly 2. Its positional accuracy can reach 0.05mm. The rotary positioning mandrel 1.2 has a surface roughness of Ra1.6 and an oil groove is provided at its location for adding wear-resistant grease to ensure its service life.

[0017] like Figure 4 As shown, the cross tetrahedral structure column assembly 2 includes a cross tetrahedral structure main body with a frame structure. The cross tetrahedral structure main body is composed of four vertical column assemblies forming a cross tetrahedral structure. The cross tetrahedral structure main body is welded from low alloy steel plates and then subjected to low-temperature annealing treatment to ensure the mechanical performance of the frame. The cross tetrahedral structure main body is fixed on the base plate 2.1. Two sets of U-grooves are symmetrically arranged on both sides of the base plate 2.1. They are locked in the T-grooves of the machine tool turntable 1.1 by T-bolts 2.2, adjusting washers 2.3, locking nuts I 2.4 and II 2.5. After the tooling main body is in place, the double nuts are tightened with a torque wrench to ensure that the tooling main body is tightly attached to the machine tool turntable and locked securely.

[0018] The column assembly includes a vertical panel and symmetrically arranged rear side panels. Two sets of U-grooves are symmetrically arranged on both sides of the vertical panel for installing locking groove screws 2.6. The locking groove screws 2.6 are used to fasten the two ends of the shaft end base 5, which can ensure that the workpiece does not shift when machining the side and also ensure the machining accuracy of the workpiece. The U-grooves are equipped with fixed weldable nuts 2.7 and welded to the vertical panel as a whole. The depth of the U-grooves is 14mm to avoid the risk of interference and collision between the milling cutter and the locking groove screws 2.6 when machining the side of the shaft end base 5.

[0019] The vertical panel has machining clearance holes at the corresponding drilling positions on the bottom surface of the shaft end base 5. These holes prevent iron filings from accumulating and getting tangled on the cutting tool during machining, thus reducing machining risks. A U-groove is provided at the upper part of the vertical panel for use with the movable rotary positioning component 4. The center line of the U-groove coincides with the center line of the vertical panel, i.e., the shaft end base 5, to ensure the dimensional accuracy requirements of the machined part. Two pin holes are symmetrically arranged on the center line of the vertical panel for precise fixing of the slot positioning component 3. M16 threaded holes are provided at these locations to connect the slot positioning component 3. The other three sides are similar. A rectangular hole is provided at the bottom of the rear side plate. The main purpose is to facilitate the drainage of cutting fluid and iron filings during machining, allowing for timely cleaning and not affecting production.

[0020] like Figure 5 As shown, the slot positioning assembly 3 includes a V-shaped positioning block 3.1 for precise positioning of the shaft end base 5. Four sets of SPH8-3 standard spring plungers 3.2 are symmetrically arranged on both sides of the V-shaped positioning block 3.1. The internal structure of the SPH8-3 standard spring plunger 3.2 is to apply a certain pressure by pushing the end float with a telescopic spring. The end has a cross groove to adjust the limit size of the plunger to ensure that the pressure applied to the workpiece on both sides of the slot positioning assembly 3 is balanced. The gap between the two ends is adjusted by multiple SPH8-3 standard spring plungers 3.2 to ensure that the force points at both ends are uniform.

[0021] The upper end of the V-shaped positioning block 3.1 is provided with a V-shaped notch, and the lower part protrudes towards the vertical panel and is provided with a mounting part. The mounting part is provided with a positioning pin 3.6 for positioning. The V-shaped positioning block 3.1 is provided with through holes at the top and bottom of the mounting part, and the vertical panel is provided with corresponding threaded holes. The cylindrical pin 3.6 is used to precisely position the slot positioning assembly 3. The lower through hole is provided with a fastening screw 3.7 to lock the V-shaped positioning block 3.1 onto the vertical panel. After the workpiece is installed, the upper through hole is used to press the workpiece with a tensioning screw 3.3, a locking nut 3.4 and a quick-change pressure plate 3.5.

[0022] The upper part of the mounting section of the V-shaped positioning block 3.1 has two large chamfers of 20×45° to avoid the U-shaped position of the workpiece and prevent interference with the workpiece.

[0023] like Figure 6As shown, the movable rotary positioning assembly 4 includes a CH-701-K vertical quick clamp 4.2. The CH-701-K vertical quick clamp 4.2 has a clamping force of up to 2550Kg, which can meet the workpiece processing clamping force. A clamp support 4.3 is set on the rear side of the CH-701-K vertical quick clamp 4.2. The clamp support 4.3 includes a T-shaped horizontal plate and a vertical plate. After machining at both ends of the horizontal plate, the vertical plate is ensured to be centered with a positional accuracy of 0.5mm. M10 threaded holes are provided at both ends of the horizontal plate for installation and positioning. The vertical plate is used to install the CH-701-K vertical quick clamp 4.2 and then weld it.

[0024] The CH-701-K vertical quick clamp 4.2 features a movable clamping block 4.1 connected to its pressure head for quick positioning of the shaft end base 5 on the baseline. The movable clamping block 4.1 has a boss at its rear end, which fits tightly with the U-groove on the upper end of the vertical panel during installation, ensuring that the workpiece center coincides with the design baseline. The lower end of the movable clamping block 4.1 has a 1.5-degree draft angle at its contact point with the workpiece, which provides better contact with the blank surface.

[0025] In use, the main body of the cross tetrahedral structure is installed on the rotary positioning spindle 1.2 of the machine tool turntable assembly 1 and positioned by the ∅10 cylindrical pin 1.3 and secured by the M12 fastening screw 1.4; the slot positioning assembly 3 is installed on the vertical panel of the main body of the cross tetrahedral structure, accurately positioned by the cylindrical pin 3.6 and secured by the fastening screw 3.7; the shaft end base 5 is inserted into the slot positioning assembly 3, with the V-shaped notch tightly against the cylindrical surface of the central cylinder to ensure good centering; the movable rotary positioning assembly 4 is installed on the main body of the cross tetrahedral structure, first installing the clamp support 4.3 and securing it with the hexagonal head fastening screw 2.8; the quick-change pressure plate 3.5 and the movable pressure block 4.1 are used to press it, and at the same time the locking groove screw 2.6 is tightened, and the shaft end base 5 can be machined normally.

[0026] like Figure 1 and Figure 7 As shown, during installation, the shaft end base 5 uses its own weight to ensure that the cylindrical surface of the central cylinder is in close contact with the V-shaped notch surface, thus ensuring that the deep cylindrical hole 5.4 is machined at the exact center of the blank. The quick-clamping fixture for multi-station machining of the shaft end base is used with a horizontal machining center H6030, and four-sided programming is performed. The machining process path is as follows: machining the bottom 4-φ13.1 hole 5.2 — machining the cylindrical deep hole 5.4 with 3 / 4-10UNC threaded hole — milling the two sides 5.3 — drilling and milling the φ31.75 side elongated hole 5.1. The four-sided machining method is similar and can be copied.

[0027] This fixture allows for machining within a reasonable space, strictly controlling the machining dimensional accuracy to meet technical requirements. The total time for quick workpiece clamping is 5 minutes, and the actual machining time is approximately 35 minutes for 4 pieces. A full-load production capacity of 48 pieces per shift is achieved, which is about 50% more efficient than traditional machining. At the same time, the personnel configuration is reduced from three to one operator, and the machining equipment is changed from three machines to one horizontal machining center, effectively reducing manufacturing costs. It is easy to operate, has a wide range of applications, and can be widely used in the mass production of shaft end bases.

[0028] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A quick-clamping assembly tooling for multi-station machining of shaft end bases, characterized in that, This includes a machine tool turntable assembly, a cross-shaped tetrahedral column assembly, a slot positioning assembly, and a movable rotary positioning assembly; The machine tool turntable assembly includes a machine tool turntable, on which T-slots are spaced apart, and a rotary positioning spindle is set at the center of the machine tool turntable; The cross tetrahedral structure column assembly includes a frame structure cross tetrahedral structure main body, which is composed of four vertical column assemblies forming a cross tetrahedral structure. The cross tetrahedral structure main body is fixed on the base plate, which is positioned by a rotating positioning mandrel and installed on the machine tool turntable with T-bolts. The column assembly includes a vertical panel and symmetrically arranged rear side panels. At least two pairs of U-grooves are symmetrically provided on both sides of the vertical panel. The fixing nuts in the U-grooves are used to install locking groove screws to press the side of the shaft end base. The slot positioning assembly is installed on the lower part of the vertical panel, including a V-shaped positioning block for positioning the lower side of the shaft end base. The upper end of the V-shaped positioning block has a V-shaped notch for engaging the cylindrical surface of the central cylinder of the shaft end base. Multiple spring plungers are provided on both sides to abut against the inner side of the shaft end base to adjust the gap between the two ends. The lower part of the V-shaped positioning block protrudes towards the vertical panel and has a mounting part that connects to the vertical panel. The V-shaped positioning block has a through hole that passes through the mounting part. The vertical panel has a corresponding threaded hole. The upper side of the shaft end base is pressed by a screwed tensioning screw, a locking nut, and a quick-change pressure plate. The movable rotary positioning assembly includes a vertical quick clamp. The vertical quick clamp is equipped with a clamp support connected to the upper end of the column assembly. The pressure head of the vertical quick clamp is connected to a movable pressure block for quick positioning of the shaft end base on the baseline. A U-groove is left at the upper part of the vertical panel. The rear end of the movable pressure block is provided with a boss that fits tightly with the U-groove when pressed.

2. The quick-clamping assembly tooling for multi-station machining of shaft end bases according to claim 1, characterized in that, The rotary positioning spindle is positioned by a cylindrical pin and locked to the machine tool turntable by fastening screws.

3. The quick-clamping assembly tooling for multi-station machining of shaft end bases according to claim 1, characterized in that, The vertical panel has machining clearance holes at the corresponding drilling positions on the bottom surface of the shaft end base.

4. The quick-clamping assembly tooling for multi-station machining of shaft end bases according to claim 1, characterized in that, A rectangular hole is provided at the bottom of the rear side plate to drain cutting fluid and iron filings during the machining process.

5. The quick-clamping assembly tooling for multi-station machining of shaft end bases according to claim 1, characterized in that, The clamp support includes a T-shaped horizontal plate and a vertical plate. The horizontal plate has threaded holes at both ends and is installed between the rear side plates on both sides by fastening screws. The vertical plate is fixedly connected to the vertical quick clamp.

6. The quick-clamping assembly tooling for multi-station machining of shaft end bases according to claim 1, characterized in that, The upper sides of the mounting part of the V-shaped positioning block are provided with chamfers to avoid the U-shaped position of the shaft end base.

7. The quick-clamping assembly tooling for multi-station machining of shaft end bases according to any one of claims 1 to 6, characterized in that, The contact surface between the lower end of the movable pressure block and the shaft end base is a sloped surface that matches the draft angle of the shaft end base blank surface.

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