Square hole two-way internal positioning multi-workpiece clamping fixture

Abstract

The present invention discloses a square hole bidirectional internal positioning multi-workpiece clamping fixture, comprising a machine tool table, a fixture body and a square hole workpiece, the fixture body comprising a fixture structure plate, a bidirectional clamping dovetail unit fixedly mounted on the fixture structure plate and a power source located below the bidirectional clamping dovetail unit, the square hole workpiece to be clamped is placed on the bidirectional clamping dovetail unit of the fixture structure plate, the bidirectional clamping dovetail unit is positioned through the inner hole of the square hole workpiece to achieve bidirectional centering clamping, the power source is used to drive the bidirectional clamping dovetail unit to achieve clamping and positioning in the X, Y and Z directions of the square hole workpiece. Through the above method, the square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention utilizes the inner hole of the square hole workpiece to perform centering positioning on the product, does not occupy other fixture tables, is conducive to the processing layout of multiple workpieces, ensures the consistency of the processing positions of multiple workpieces, and comprehensively and effectively improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloy battery tray forming, and in particular to a square hole bidirectional inner positioning multi-workpiece clamping tool. Background Art

[0002] In the traditional solution, the clamping method for square hole products is to clamp each product separately, such as Figure 1 As shown, a vise 2' or a clamping tool with the same function as the vise 2' is used to clamp the exterior of a single workpiece 1' and position the workpiece 1' individually. This clamping method has the following disadvantages:

[0003] 1. Only single workpiece 1' can be clamped, resulting in low production efficiency;

[0004] Second, the positioning method is to lock from the outside to the inside, that is, the inside is a fixed reference surface. Since the casting workpiece itself has certain dimensional fluctuations, and such workpieces 1' have concentricity requirements, this unilateral positioning method will cause the processing errors of different workpieces 1' to be consistent, and the high consistency requirements of the processing position cannot be guaranteed, and the product quality cannot be guaranteed. Summary of the Invention

[0005] The main technical problem solved by the present invention is to provide a square hole bidirectional internal positioning multi-workpiece clamping tool, which uses the inner hole of the square hole workpiece to center the product without occupying other workpiece surfaces, is conducive to the layout of multi-workpiece processing, ensures the consistency of the processing positions of multiple workpieces, and comprehensively and effectively improves production efficiency.

[0006] In order to solve the above technical problems, the present invention adopts a technical solution: to provide a square hole bidirectional internal positioning multi-workpiece clamping fixture, comprising: a machine tool table, a fixture body mounted on the machine tool table, and a square hole workpiece clamped on the fixture body.

[0007] The tooling body includes:

[0008] Tooling structure plate, the square hole workpiece to be clamped is placed on the tooling structure plate;

[0009] The bidirectional clamping dovetail unit is fixedly mounted on the tooling structure plate and positions the square hole workpiece through the inner hole of the square hole workpiece to achieve bidirectional centering clamping.

[0010] The power source is located below the bidirectional clamping dovetail unit and is used to drive the bidirectional clamping dovetail unit to achieve clamping positioning in the X, Y and Z directions of the square hole workpiece.

[0011] In a preferred embodiment of the present invention, the power source is a cylinder, which inputs power to the bidirectional clamping dovetail unit.

[0012] In a preferred embodiment of the present invention, one bidirectional clamping dovetail unit corresponds to one cylinder and one square hole workpiece, and the number of bidirectional clamping dovetail units on the tooling structure plate matches the number of workpieces actually produced.

[0013] In a preferred embodiment of the present invention, a plurality of bidirectional clamping dovetail units are connected to a hand-operated valve by corresponding air cylinders through pipe joints, air pipes and air nozzles, and the hand-operated valve is connected to an external air circuit.

[0014] In a preferred embodiment of the present invention, the bidirectional clamping dovetail unit includes a dovetail concave block, a dovetail convex block, a fixing block and a cylinder piston shaft.

[0015] The two dovetail concave blocks cooperate to form a trapezoidal dovetail groove, and the dovetail convex block cooperates to be installed in the trapezoidal dovetail groove. The center of the dovetail convex block is connected to the cylinder piston shaft through a connecting bolt.

[0016] The outer surfaces of the left and right sides of the dovetail concave block are provided with guide grooves, and the dovetail concave block cooperates with the fixed block through the guide grooves, and the fixed block is fixed to the tooling structure plate through locking bolts and pins.

[0017] In a preferred embodiment of the present invention, the outer surfaces of the front and rear sides of the dovetail recess have knurled surfaces, the square hole workpiece is installed into the bidirectional clamping dovetail unit in an inverted manner through the inner hole, and the dovetail recess contacts the inner hole surface of the square hole workpiece through the knurled surface.

[0018] In a preferred embodiment of the present invention, the bidirectional clamping dovetail unit further includes ball plungers located on the left and right sides of the fixed block, and the square hole workpiece is pre-clamped in the X direction by the ball plungers.

[0019] In a preferred embodiment of the present invention, the hand lever valve is turned, and the external air circuit provides air source power to the cylinder through the air pipe, driving the cylinder to control the up and down movement of the cylinder piston shaft.

[0020] In a preferred embodiment of the present invention, when the cylinder piston shaft moves downward, the dovetail protrusion is driven downward by the connecting bolt, and the dovetail protrusion slides downward in the trapezoidal dovetail groove, pushing the two dovetail recesses outward at the same time. The dovetail recesses press the inner hole surface of the square hole workpiece through the knurled surfaces on the front and rear sides, thereby clamping the square hole workpiece in the Y direction.

[0021] In a preferred embodiment of the present invention, the square hole workpiece is fixed on the tooling structure plate in the Z direction for support and positioning.

[0022] The beneficial effects of the present invention are as follows: the square hole bidirectional internal positioning multi-workpiece clamping tooling of the present invention adopts a bidirectional clamping dovetail unit, and uses the inner hole of the square hole workpiece to center the product, ensuring the consistency of the processing positions of multiple workpieces, and comprehensively and effectively improving production efficiency. The product clamping also has a self-locking function to prevent the workpiece from being scrapped due to movement during machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0024] Figure 1 This is a structural diagram of the square hole positioning and clamping tooling in the existing solution;

[0025] Figure 2 This is a structural diagram of a preferred embodiment of the square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention applied to a machine tool;

[0026] Figure 3 It is a structural schematic diagram of a preferred embodiment of a square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a preferred embodiment of a bidirectional clamping dovetail unit in a square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention;

[0028] Figure 5 This is a front view of a preferred embodiment of a bidirectional clamping dovetail unit in a square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention;

[0029] Figure 6 yes Figure 5 AA sectional view;

[0030] Figure 7 It is a structural schematic diagram of a preferred embodiment of a square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention in which multiple bidirectional clamping dovetail units are connected in series through air pipes;

[0031] The components in the accompanying drawings are marked as follows: 1', workpiece, 2', vise,

[0032] 100. Machine tool table, 200. Tooling body, 210. Tooling structure plate, 220. Bidirectional clamping dovetail unit, 221. Dovetail concave block, 222. Dovetail convex block, 223. Connecting bolt, 224. Fixing block, 225. Guide slide, 226. Ball plunger, 227. Knurled surface, 228. Cylinder piston shaft, 230. Cylinder, 240. Pipe joint, 250. Air pipe, 260. Air nozzle, 270. Hand lever valve, 300. Square hole workpiece. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figures 2 to 7 , embodiments of the present invention include:

[0035] A square hole bidirectional inner positioning multi-workpiece clamping tool comprises: a machine tool table 100, a tool body 200 mounted on the machine tool table 100, and a square hole workpiece 300 clamped on the tool body 200.

[0036] The tooling body 200 includes a tooling structure plate 210, a bidirectional clamping dovetail unit 220 fixedly mounted on the tooling structure plate 210, and a power source located below the bidirectional clamping dovetail unit 220:

[0037] The square hole workpiece 300 to be clamped is placed on the bidirectional clamping dovetail unit 220 of the tooling structure plate 210. The bidirectional clamping dovetail unit 220 positions the square hole workpiece 300 through the inner hole of the square hole workpiece 300 to achieve bidirectional centering clamping. The power source is used to drive the bidirectional clamping dovetail unit 220 to move and realize clamping positioning of the square hole workpiece 300 in the X, Y and Z directions.

[0038] The power source is the cylinder 230 , and one bidirectional clamping dovetail unit 220 corresponds to one cylinder 230 and one square hole workpiece 300 . The number of bidirectional clamping dovetail units 220 on the tooling structure plate 210 matches the number of workpieces actually produced.

[0039] A plurality of square hole workpieces 300 are clamped and positioned by the tooling body 200, which is fixed on the machine table 100, which is part of the CNC machine tool, so that batch processing can be performed on the CNC;

[0040] The figure shows a solution of 15 pieces per mold, that is, 15 bidirectional clamping dovetail units 220 are placed on a tooling structure plate 210. The specific number of workpieces produced can be determined according to the actual machine tool size and production rhythm requirements.

[0041] The cylinder 230 inputs power to the bidirectional clamping dovetail unit 220. Multiple bidirectional clamping dovetail units 220 are connected to the hand-operated valve 270 by the corresponding cylinder 230 through the pipe joint 240, the air pipe 250 and the air nozzle 260. The hand-operated valve 270 is connected to the external air circuit and can realize pneumatic control of all bidirectional clamping dovetail units 110 on the tooling body 200.

[0042] The bidirectional clamping dovetail unit 220 includes a dovetail concave block 221, a dovetail convex block 222, a fixing block 224, and a cylinder piston shaft 228. The two dovetail concave blocks 221 are assembled together with the dovetail convex block 222 through a trapezoidal dovetail groove: the two dovetail concave blocks 221 cooperate to form a trapezoidal dovetail groove, and the dovetail convex block 222 cooperates to be installed in the trapezoidal dovetail groove;

[0043] The outer surfaces of the left and right sides of the dovetail recessed block 222 have guide slots 225 , and the dovetail recessed block 222 cooperates with the fixed block 224 through the guide slots 225 . The fixed block 224 is fixed to the tooling structure plate 210 through locking bolts and pins.

[0044] The outer surfaces of the front and rear sides of the dovetail recess 222 have knurled surfaces 227 . The square hole workpiece 300 is inserted into the bidirectional clamping dovetail unit 220 in an inverted manner through the inner hole. The dovetail recess 222 contacts the inner hole surface of the square hole workpiece 300 through the knurled surface 227 .

[0045] The bidirectional clamping dovetail unit 220 further includes a ball plunger 226 , which is located on the left and right sides of the fixing block 224 . The ball plunger 226 is used to pre-clamp the square hole workpiece 300 in the X direction.

[0046] Furthermore, the center of the dovetail protrusion 222 is connected to the cylinder piston shaft 228 through the connecting bolt 223, and the hand lever valve 270 is turned. The external air circuit provides air source power to the cylinder 230 through the air pipe 250, driving the cylinder 230 to control the cylinder piston shaft 228 to move up and down.

[0047] When the cylinder piston shaft 228 moves downward, the dovetail protrusion 222 is driven downward by the connecting bolt 223, and the dovetail protrusion 222 slides downward in the trapezoidal dovetail groove, pushing the two dovetail recesses 221 outward at the same time. The dovetail recesses 221 press the inner hole surface of the square hole workpiece through the knurled surfaces on the front and rear sides, thereby clamping the square hole workpiece 300 in the Y direction.

[0048] While the bidirectional clamping dovetail unit 220 performs bidirectional centering clamping on the square workpiece 300, the trapezoidal dovetail structure can self-lock the clamping unit to prevent the workpiece from moving during machining.

[0049] The clamping process of the square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention is:

[0050] Place the square hole workpiece 300 upside down into each corresponding bidirectional clamping dovetail unit 220, and the ball plunger 226 pre-clamps the square hole workpiece 300 in the left and right directions (i.e., X direction);

[0051] When the hand lever valve 270 is turned, the external air circuit provides air source power to the cylinder 230 through the air pipe 250. When the cylinder 230 controls the cylinder piston shaft 228 to move downward, the dovetail protrusion 222 is driven downward through the connecting bolt 223.

[0052] The dovetail protrusion 222 slides downward through the trapezoidal dovetail groove, pushing the two dovetail recesses 221 to move to both sides at the same time, thereby clamping the square hole workpiece 300 in the front-to-back direction (ie, the Y direction).

[0053] The outer side of the dovetail concave block 221 has a knurled surface 227 that contacts the inner surface of the square hole workpiece, thereby increasing the friction force during horizontal clamping and preventing the square hole workpiece 300 from moving horizontally.

[0054] The square hole workpiece 300 is supported and positioned in the Z direction by being fixed on the tooling structure plate 210;

[0055] In this way, the square hole workpiece 300 is positioned in the X, Y and Z directions.

[0056] The beneficial effects of the square hole bidirectional internal positioning multi-workpiece clamping fixture of the present invention are:

[0057] The bidirectional clamping dovetail unit is used to center the product using the inner hole of the square hole workpiece, avoiding the process problem of unstable machining dimensions caused by product size fluctuations in traditional unilateral positioning, ensuring the consistency of the processing positions of multiple workpieces and effectively improving production efficiency.

[0058] The trapezoidal dovetail structure not only clamps the product but also has a self-locking function, preventing the workpiece from being scrapped due to movement during machining.

[0059] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A square hole bidirectional internal positioning multi-workpiece clamping fixture, characterized in that: include: The machine table, the tooling body mounted on the machine table, and the square hole workpiece clamped on the tooling body. The tooling body includes: Tooling structure plate, the square hole workpiece to be clamped is placed on the tooling structure plate; The bidirectional clamping dovetail unit is fixedly installed on the tooling structure plate. The number of bidirectional clamping dovetail units on the tooling structure plate matches the actual number of workpieces produced. 15 bidirectional clamping dovetail units are placed on one tooling structure plate. The square hole workpiece is positioned through the inner hole of the square hole workpiece to achieve bidirectional centering clamping. The square hole workpiece is placed in each corresponding bidirectional clamping dovetail unit in an upside-down manner: The bidirectional clamping dovetail unit includes a dovetail concave block, a dovetail convex block, a fixed block and a cylinder piston shaft. The two dovetail concave blocks cooperate to form a trapezoidal dovetail groove. The dovetail convex block is installed in the trapezoidal dovetail groove. The center of the dovetail convex block is connected to the cylinder piston shaft through a connecting bolt. The outer surfaces of the left and right sides of the dovetail concave block have guide grooves. The dovetail concave block cooperates with the fixed block through the guide groove. The fixed block is fixed to the tooling structure plate through locking bolts and pins. The outer surfaces of the front and rear sides of the dovetail concave block are knurled. The square hole workpiece is inserted into the bidirectional clamping dovetail unit in an inverted manner through the inner hole. The dovetail concave block contacts the inner hole surface of the square hole workpiece through the knurled surface. The power source is located below the bidirectional clamping dovetail unit and is used to drive the bidirectional clamping dovetail unit to achieve clamping positioning in the X, Y, and Z directions of the square hole workpiece. The power source is a cylinder that inputs power to the bidirectional clamping dovetail unit. One bidirectional clamping dovetail unit corresponds to one cylinder and one square hole workpiece. Multiple bidirectional clamping dovetail units are connected to the hand lever valve by the corresponding cylinder through pipe joints, air pipes and air nozzles. The hand lever valve is connected to the external air circuit. The bidirectional clamping dovetail unit also includes a ball plunger, which is located on the left and right sides of the fixed block. The ball plunger is used to pre-clamp the square hole workpiece in the X direction. When the hand lever valve is turned, the external air circuit provides air source power to the cylinder through the air pipe, driving the cylinder to control the up and down movement of the cylinder piston shaft. When the piston shaft of the power source moves downward, the dovetail protrusion is driven downward by the connecting bolt, and the dovetail protrusion slides downward in the trapezoidal dovetail groove, pushing the two dovetail recesses outward at the same time. The dovetail recesses press the inner hole surface of the square hole workpiece through the knurled surfaces on the front and rear sides, thereby clamping the square hole workpiece in the Y direction. The square hole workpiece is fixed on the tooling structure plate in the Z direction for support and positioning.

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