Positioning device for thin-wall workpiece machining grinding machine

Abstract

The utility model provides a positioning device for a thin-wall workpiece machining grinding machine. The positioning device comprises a clamp base and a plurality of clamping assemblies. The clamping assembly comprises a top pressing plate, a limiting rod and a positioning base plate, one end of the limiting rod is fixedly connected with the positioning base plate, and the other end of the limiting rod is movably connected with the top pressing plate; the positioning base plates of the multiple clamping assemblies are arranged in the circumferential direction of the periphery of the clamp base at intervals, and the positioning base plates and the clamp base are mutually independent. According to the utility model, the processing convenience is improved, and thin-wall workpieces with different sizes and shapes can be adapted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of machining, and relates to a positioning device for a thin -walled workpiece machining grinding machine. BACKGROUND

[0002] When grinding machine processes products, part products need to use fixtures for cooperation processing due to the particularity of their own material and structure. The fixtures used for processing different workpieces are not universal, and a special fixture needs to be made for each change of workpiece for processing, which causes the increase of fixture manufacturing cost and reduces the fixture utilization rate, which is not conducive to continuous processing production.

[0003] CN209408231U discloses a universal fixture for a grinding machine, which comprises a base detachably connected to the workbench of the grinding machine, the base is a square plate, an L-shaped positioning plate is fixedly connected to one right-angle edge of the upper surface of the base, a first sliding groove is formed in the upper surface of the base and extends to one side of the positioning plate, a first sliding block is arranged in the first sliding groove, the top end of the first sliding block is fixedly connected to a first clamping plate parallel to one side of the positioning plate, a second sliding groove is formed in the upper surface of the base and extends to the other side of the positioning plate, a second sliding block is arranged in the second sliding groove, the top end of the second sliding block is fixedly connected to a second clamping plate parallel to the other side of the positioning plate, and elastic members are fixedly connected to the ends of the first and second sliding blocks away from the positioning plate, which has the effect of facilitating positioning.

[0004] CN211728362U discloses a universal fixture for a cylinder pipe grinding machine lathe, which comprises a cylinder fixture base, an internal hexagonal screw and a cylinder fixture pressure plate, the upper end face of the cylinder fixture base is symmetrically movably connected with a cylinder fixture pressure plate for limiting, and the cylinder fixture base comprises a sliding groove, a base shell, a positioning bolt hole, a limiting hole and a connecting hole, eight groups of sliding grooves for connection are uniformly and equidistantly formed on the outer end face of the base shell, which improves the stability of fixation and facilitates users to quickly clamp and fix different models of cylinders.

[0005] However, for thin-walled workpiece products, the existing grinding machine fixture can only clamp and position products of specific size and structure, and the scope of application is small. For the processing and grinding of different thin-walled workpieces, different fixtures need to be replaced, which wastes clamping time and prolongs the processing cycle.

[0006] Therefore, it is necessary to provide a universal fixture capable of effectively clamping and fixing thin-walled workpieces. UTILITY MODEL CONTENTS

[0007] In view of the deficiencies of the prior art, the positioning device for the thin-wall workpiece machining grinding machine is provided, which improves the processing convenience under the premise of ensuring the positioning requirement of machining and can be adapted to thin-wall workpieces of different sizes and shapes.

[0008] To achieve the purpose, the utility model adopts the following technical solutions:

[0009] The utility model provides a positioning device for thin-wall workpiece machining grinding machine, positioning device for thin-wall workpiece machining grinding machine includes clamp base and a plurality of clamping components, clamping component includes top pressure plate, limit rod and positioning base plate, one end of limit rod is fixedly connected with positioning base plate, and the other end is movably connected with top pressure plate, the positioning base plate of a plurality of clamping components is arranged along the circumferential interval of the outer periphery of clamp base and is independent with clamp base.

[0010] The positioning device for thin-wall workpiece machining grinding machine provided by the utility model adopts split design, achieves the effect of weight reduction, improves the operation convenience, and has stronger processing adaptability and can be adapted to the machining of thin-wall workpieces of different sizes and shapes.

[0011] As an optimal technical scheme of the utility model, the clamp base comprises a supporting bottom plate, and a limiting boss is arranged on the supporting bottom plate; the end surface of the supporting bottom plate is flush with the end surface of the positioning base plate, and the supporting bottom plate and the positioning base plate are arranged in contact or are arranged apart; and the height of the limiting rod is greater than the height of the limiting boss.

[0012] In the application process, the thin-wall workpiece is placed on the limiting boss of the clamp base, and the top pressure plate of the clamping component is used for pressing, so that the thin-wall workpiece is coaxial with the limiting boss, has a good supporting and positioning effect, and avoids the sliding of the workpiece and affects the machining effect.

[0013] It should be noted that the end surface of the supporting bottom plate in the utility model refers to the upper end surface, i.e. the end surface on which the limiting boss is arranged; and the end surface of the positioning base plate refers to the upper end surface, i.e. the end surface on which the limiting rod is connected.

[0014] As an optimal technical scheme of the utility model, the sum of the areas of the orthographic projections of the positioning base plates of the plurality of clamping components on the plane of the clamp base is 2% to 15% of the area of the orthographic projection of the supporting bottom plate on the plane of the clamp base, for example, can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15%, but is not limited to the listed values, and other values in the range also apply.

[0015] The surface of the limiting boss is provided with a buffer layer, and the buffer layer is provided with anti-skid lines.

[0016] The buffer layer protects the thin-wall workpiece from damage during machining, prevents the thin-wall workpiece from sliding, and is beneficial to improving machining quality.

[0017] The thickness of the positioning base plate is greater than 30 mm.

[0018] The minimum linear length of the normal projection of the positioning base plate on the plane of the clamp base is greater than 100 mm.

[0019] The size of the positioning base plate is controlled within the above range, so that the magnetic force between the positioning base plate and the grinding machine disc is large enough, and the clamping assembly is prevented from sliding.

[0020] The outer surface of the limiting rod is provided with external threads, the top pressing plate is provided with a through internal thread hole, the limiting rod is arranged in the internal thread hole, and the internal thread hole and the external threads are engaged with each other.

[0021] The outer periphery of the limiting rod is further sleeved with a spring, and the two ends of the spring are connected with the top pressing plate and the positioning base plate, respectively.

[0022] The top pressing plate of the utility model is movable along the axial direction of the limiting rod, so that the height thereof can be adjusted to adapt to the machining of thin-wall workpieces of different thicknesses, and the overall flexibility is improved.

[0023] The material of the clamp base is aluminum, and the material of the clamping assembly is iron.

[0024] In the utility model, the clamp base is made of aluminum material, so that the weight is light and the weight reduction effect is achieved; the clamping assembly is made of iron material, so that the adsorption force between the clamping assembly and the grinding machine disc is ensured, the sliding of the clamping assembly is prevented, and the machining effect is affected.

[0025] The number of the clamping assemblies is 3-8, for example, 3, 4, 5, 6, 7 or 8.

[0026] According to the actual size and weight of the thin-wall workpiece, a plurality of clamping assemblies are used in cooperation, so that the positioning stability during machining is ensured, and the machining quality is improved.

[0027] Compared with the prior art, the utility model has the advantages that:

[0028] The positioning device for the thin-wall workpiece machining grinding machine has good supporting and positioning effects, adopts a split design, is light in weight, convenient to operate, has stronger machining adaptability, has universality, and can be suitable for machining of thin-wall workpieces with different sizes and shapes. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A side view of the positioning device for the thin-wall workpiece machining grinding machine provided for the embodiment 1.

[0030] Figure 2 A top view of the positioning device for the thin-wall workpiece machining grinding machine provided for the embodiment 1.

[0031] Figure 3 A side view of the positioning device for the grinding machine provided for the comparative example 1.

[0032] Figure 4 A top view of the positioning device for the grinding machine provided for the comparative example 1.

[0033] Wherein, 1 is a supporting bottom plate, 2 is a limiting boss, 3 is a top pressing plate, 4 is a limiting rod, 5 is a positioning base plate, 6 is an internal threaded hole, 7 is a thin-wall workpiece, and 8 is a spring. DETAILED DESCRIPTION

[0034] It should be understood that, in the description of the present application, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" or "several" is two or more.

[0035] It should be noted that, in the description of the present application, unless otherwise specified and limited, the terms "provided", "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0036] The technical scheme of the present application will be further described below in conjunction with the drawings and through specific embodiments.

[0037] The utility model provides a kind of positioning device for thin-walled workpiece processing grinding machine, including fixture base and several clamping components, it is applicable to the thin-walled workpiece of various sizes and shapes, when using, the thin-walled workpiece is placed on fixture base to support, then it is positioned using clamping component.The clamping component includes top pressure plate, limit rod and positioning base plate, one end of the limit rod is fixedly connected with the positioning base plate, the other end movably connects the top pressure plate, so that the height of the top pressure plate can be adjusted, the limit rod is in abutment with the side wall of thin-walled workpiece, prevent workpiece from falling off, and the top pressure plate clamps the end surface edge of thin-walled workpiece.Several positioning base plates of the clamping component are arranged along the outer circumferential direction of the fixture base, and are independent of the fixture base.According to the shape and size of thin-walled workpiece, the position and quantity of clamping component are arranged, so that the thin-walled workpiece surface is uniformly stressed, and the flatness of the processed product is guaranteed to meet the requirements.

[0038] Specifically, the number of clamping components is 3-8, and they are arranged equidistantly along the circumference of the thin-walled workpiece on the fixture base, to ensure the stability of positioning.

[0039] For example, when the thin-walled workpiece is circular, the number of clamping components is three, and they are arranged in a central symmetric manner along the outer circumference of the fixture base; the number of clamping components can also be four, and they are arranged in a symmetric manner along the outer circumference of the fixture base.

[0040] The fixture base includes a support base plate, and a limiting boss is arranged on the support base plate, which is suitable for thin-walled workpieces with grooves on the bottom surface. During application, the support base plate is placed on the magnetic disk of the grinding machine, and the limiting boss is inserted into the groove of the thin-walled workpiece for support. The end surface of the support base plate is flush with the end surface of the positioning base plate, and the support base plate and the positioning base plate are arranged in contact or spaced apart. That is, the support base plate and the positioning base plate are independent of each other, and according to the size of the thin-walled workpiece, the support base plate and the positioning base plate can be in contact or have a certain gap. The height of the limit rod is greater than the height of the limiting boss, so that the top pressure plate can press the end surface edge of the thin-walled workpiece on the limiting boss.

[0041] The sum of the areas of the orthogonal projections of the positioning base plates of the several clamping components on the plane of the fixture base is 2%-15% of the area of the orthogonal projection of the support base plate on the plane of the fixture base.

[0042] Further, the surface of the limiting boss is provided with a buffer layer, and the buffer layer is provided with anti-skid lines. The buffer layer can be a rubber pad commonly used by those skilled in the art, and the anti-skid lines can be regular shapes or regular shapes, which are not limited in the utility model.

[0043] In some embodiments, the positioning substrate has a thickness > 30 mm. The minimum linear length of the orthographic projection of the positioning substrate on the plane where the clamp base is located is > 100 mm. The shape of the positioning substrate can be square, rectangular, circular or triangular, which can be adjusted by those skilled in the art according to actual process requirements.

[0044] In some embodiments, the outer surface of the limiting rod is provided with external threads, the top pressing plate is provided with a through internal threaded hole, the limiting rod is arranged in the internal threaded hole, and the internal threaded hole and the external threads are engaged with each other. In order to avoid the top pressing plate moving up and down during processing, a fastening nut is further arranged on the limiting rod, and after the top pressing plate is pressed against the thin-walled workpiece, the fastening nut is screwed to fix it.

[0045] Further, the outer periphery of the limiting rod is further sleeved with a spring, and the two ends of the spring are connected with the top pressing plate and the positioning substrate, respectively.

[0046] In some embodiments, the material of the clamp base is aluminum, and the material of the clamping assembly is iron. Compared with the traditional pure iron or stainless steel clamp, the positioning device provided by the present application has the advantages of light weight, easy operation, weight reduction effect, and large adsorption force between the positioning device and the grinding disc.

[0047] In order to further improve the use reliability of the positioning device, the bottom surface of the top pressing plate and the outer surface of the limiting rod, i.e. the side surface of the top pressing plate and the limiting rod close to the thin-walled workpiece, can be provided with a flexible pad for protection, so as to avoid damaging the thin-walled workpiece during processing. The flexible pad can be a rubber pad or a flexible adhesive tape known to those skilled in the art.

[0048] For example, the working process of the positioning device for thin-walled workpiece processing grinding machine provided by the present application includes: moving the clamp base to the magnetic disc of the grinding machine and placing it, placing the thin-walled workpiece to be processed with a groove in the bottom above the clamping base, making the limiting boss extend into the groove, and protecting it with a buffer layer to achieve preliminary limiting; placing a plurality of clamping assemblies along the circumference of the clamp base, adjusting the position of each clamping assembly according to the size and shape of the thin-walled workpiece, generating an adsorption force between the positioning substrate and the magnetic disc of the grinding machine to fix it, making the limiting rod abut against the outer side wall of the thin-walled workpiece, adjusting the height of the top pressing plate, making the bottom surface of the top pressing plate touch the end face edge of the thin-walled workpiece, and achieving workpiece positioning.

[0049] Example 1

[0050] The present embodiment provides a positioning device for thin-walled workpiece processing grinding machine, which comprises a clamp base and a plurality of clamping assemblies arranged on the clamp base. Figure 1 Compared with the prior art, Figure 2As shown, including the independent clamp base and four clamping components. Clamp base with aluminum material, clamping components with iron material. Clamp base includes a support plate 1, the support plate 1 is provided with a limiting boss 2, the surface of the limiting boss 2 is provided with a buffer layer, the buffer layer is provided with an anti-skid pattern. The cross section of the support plate 1 is circular, the diameter is 600mm. Each clamping component independently includes a top plate 3, a limiting rod 4 and a positioning base plate 5. The outer surface of the limiting rod 4 is provided with an external thread, the top plate 3 is provided with a through inner thread hole 6, the limiting rod 4 is provided in the inner thread hole 6 and fixedly connected with the positioning base plate 5, and the inner thread hole 6 and the external thread are engaged with each other. The outer periphery of the limiting rod 4 is further provided with a spring 8, and the two ends of the spring 8 are respectively connected with the top plate 3 and the positioning base plate 5. The positioning base plate 5 is in a rectangular structure, the length is 120mm, the width is 110mm, and the thickness is 40mm. Four clamping components are arranged along the outer periphery of the clamp base at equal intervals, the height of the limiting rod 4 is greater than the height of the limiting boss 2, the end surface of the support plate 1 is flush with the end surface of the positioning base plate 5, and a gap is left between the support plate 1 and the positioning base plate 5.

[0051] Comparative Example 1

[0052] The present comparative example provides a positioning device for a grinding machine, which is different from example 1 in that: Figure 3 and Figure 4 As shown, the clamp base and the clamping component are integrated structure, both of which are made of iron material, and the rest of the structure and size are the same as example 1.

[0053] Compared with the split design of example 1, the positioning device of comparative example 1 is an integrated structure, which causes the overall quality of the clamp to be relatively heavy, causing inconvenience to the processing process, and the size range of clamping is certain, and the adaptation performance is lower than that of example 1.

[0054] The applicant declares that the above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. It should be understood by those skilled in the art that any changes or replacements within the technical scope disclosed by the present application can be easily thought of by those skilled in the art, and all fall within the protection scope and disclosure scope of the present application.

Claims

1. A positioning device for a thin-walled workpiece processing grinder, characterized by, The positioning device for the thin-wall workpiece processing grinding machine comprises a clamp base and a plurality of clamping assemblies; the clamping assembly comprises a top pressing plate, a limiting rod and a positioning base plate, one end of the limiting rod is fixedly connected with the positioning base plate, and the other end is movably connected with the top pressing plate; the positioning base plates of the plurality of clamping assemblies are arranged in a circumferential interval along the outer periphery of the clamp base and are independent of each other.

2. The positioning device for thin-walled workpiece processing grinding machines according to claim 1, characterized in that, The clamp base comprises a supporting bottom plate, and a limiting boss is arranged on the supporting bottom plate; The end surface of the supporting bottom plate is flush with the end surface of the positioning base plate, and the supporting bottom plate and the positioning base plate are arranged in contact or are arranged separately; The height of the limiting rod is greater than the height of the limiting boss.

3. The positioning device for thin-walled workpiece processing grinding machines according to claim 2, characterized in that, The total area of the orthographic projection of the positioning base plates of the plurality of clamping assemblies on the plane where the clamp base is located is 2% to 15% of the area of the orthographic projection of the supporting bottom plate on the plane where the clamp base is located.

4. The positioning device for thin-walled workpiece processing grinding machines according to claim 2 or 3, characterized in that, A buffer layer is arranged on the surface of the limiting boss, and an anti-skid pattern is arranged on the buffer layer.

5. The positioning device for thin-walled workpiece processing grinding machines according to claim 1, characterized in that, The thickness of the positioning base plate is greater than 30 mm.

6. The positioning device for thin-walled workpiece processing grinding machines according to claim 1, characterized in that, The minimum linear length of the orthographic projection of the positioning base plate on the plane where the clamp base is located is greater than 100 mm.

7. The fixture for thin-walled workpiece machining grinder according to claim 1, characterized in that, An outer thread is arranged on the outer surface of the limiting rod, and a through inner thread hole is formed in the top pressing plate, the limiting rod is arranged in the inner thread hole, and the inner thread hole and the outer thread are engaged with each other.

8. The positioning device for thin-walled workpiece processing grinding machines according to claim 7, characterized in that, A spring is further sleeved on the outer periphery of the limiting rod, and the two ends of the spring are respectively connected with the top pressing plate and the positioning base plate.

9. The fixture for thin-walled workpiece machining grinder according to claim 1, characterized in that, The material of the clamp base is aluminum, and the material of the clamping assembly is iron.

10. The positioning device for thin-walled workpiece processing grinding machines according to claim 1, characterized in that, The number of the clamping assemblies is 3 to 8.

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