MIM product sintering auxiliary jig

Abstract

The utility model belongs to the technical field of MIM workpiece sintering assisting, and particularly relates to an MIM product sintering assisting jig which comprises a workpiece clamping and fixing assembly, a supporting assembly is installed at the bottom of the workpiece clamping and fixing assembly, and an auxiliary fixing assembly is installed at the top of the supporting assembly. The workpiece clamping and fixing assembly comprises a supporting rod, the side of the supporting rod is fixedly connected with a metal shell, the interior of the metal shell is fixedly connected with a spring, the end of the spring is fixedly connected with a connecting rod, and the end of the connecting rod is fixedly connected with a clamping plate. According to the technical scheme, the product can be stably clamped, deformation or damage of the product caused by too tight clamping force is avoided, it is very critical to guarantee the shape precision of the product in the sintering process, a sliding structure formed by the connecting rod and the metal shell limits the movement direction of the clamping plate while guaranteeing normal stretching and retracting of the spring, and therefore the stability of the product is improved. In this way, it can be ensured that the clamping plates only do linear motion under the action of the springs, and clamping force is accurately applied to a product.

Description

TECHNICAL FIELD

[0001] The utility model relates to MIM workpiece sintering auxiliary technical field, concretely a kind of MIM product sintering auxiliary jig. BACKGROUND

[0002] MIM is the abbreviation of metal injection molding, and metal injection molding is a molding method for injecting plasticized mixture of metal powder and its binder into a mold. It is to mix the selected powder with the binder, then granulate the mixture and inject the shape required. The polymer imparts the characteristics of viscous flow to the mixture, which helps the uniformity of shaping, mold cavity filling and powder packing. After shaping, the binder is removed, and the defatted blank is sintered. Some sintered products may also be subjected to further densification treatment, heat treatment or machining. The sintered product not only has the same complex shape and high precision as the product obtained by plastic injection molding method, but also has physical, chemical and mechanical properties close to forged parts. This process technology is suitable for mass production of small, precise, three-dimensional shape complex and special performance requirements of metal parts.

[0003] In Chinese patent CN201922268080.X, the utility model discloses a kind of MIM product sintering furnace loading jig, including support, electric push rod is installed on the support, the end of electric push rod away from support is installed with fixed plate by bolt, the bottom of fixed plate is welded with fixed block, the bottom of fixed plate is equipped with sliding slot, sliding block is slidably installed in the sliding slot, the end of sliding block is welded with movable block, the side of movable block close to fixed block and the side of fixed block close to movable block are equipped with V-shaped groove, the side of fixed plate is slidably installed with screw rod, the end of screw rod is sequentially penetrated in sliding slot and sliding block, the side of sliding block is equipped with screw hole, the screw rod is connected with sliding block by screw hole and screw thread, the bottom of fixed plate is installed with motor by bolt.The utility model can avoid that blank is stuck in the joint of jig, and can reduce the occurrence of blank falling during clamping and conveying.

[0004] The existing MIM product sintering auxiliary jig is mostly fixed by clamping device during sintering. Excessive force during clamping may cause damage to the workpiece. When the clamping force is small, the workpiece may fall off.

[0005] Therefore, a MIM product sintering auxiliary jig is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0006] In order to make up for the deficiencies of the prior art, the problem that the existing MIM product sintering auxiliary jig is mostly fixed through a clamping device when sintering, and the workpiece may be damaged due to excessive clamping force, or the workpiece may fall off due to insufficient clamping force is solved.

[0007] The utility model discloses a kind of MIM product sintering auxiliary jigs, which solves the technical problems as follows: the utility model discloses a kind of MIM product sintering auxiliary jig, including workpiece clamping and fixing assembly, the bottom of workpiece clamping and fixing assembly is installed with support assembly, and the top of support assembly is installed with auxiliary fixing assembly;The workpiece clamping and fixing assembly includes support rod, the side of support rod is fixedly connected with metal shell, and the inside of metal shell is fixedly connected with spring, the end of spring is fixedly connected with connecting rod, and the end of connecting rod is fixedly connected with clamping plate.

[0008] Preferably, the support rod and the metal shell are integrally arranged, the metal shell and the spring are vertically coaxial, and the connecting rod and the metal shell form an elastic structure through the spring.

[0009] Preferably, the connecting rod and the metal shell are vertically coaxial, the connecting rod and the metal shell form a sliding structure, and the connecting rod and the clamping plate are integrally arranged.

[0010] Preferably, the support assembly includes a support frame, the top end of the support frame is provided with a clamping groove, and the outer wall of the support frame is slidably connected with a hoop, one side of the hoop is fixedly provided with a support plate, the other side of the hoop is fixedly connected with a nut, and the inside of the nut is threadedly connected with a bolt.

[0011] Preferably, the support plate, the hoop and the support frame form a sliding structure, the hoop and the nut are integrally arranged, and the inside of the nut is threadedly connected with the bolt.

[0012] Preferably, the auxiliary fixing assembly includes a buckle, the end of the buckle is fixedly connected with an inner thread rod, the inside of the inner thread rod is threadedly connected with a threaded rod, and the end of the threaded rod is fixedly connected with a friction block.

[0013] Preferably, the inner thread rod, the buckle and the support frame form a clamping structure, the friction block, the threaded rod and the inner thread rod form a sliding structure, and the threaded rod and the inner thread rod form a threaded structure.

[0014] The utility model has the advantages that:

[0015] 1.The utility model discloses a workpiece clamping and fixing assembly is provided, the spring is set to make the clamping plate have elasticity, when clamping MIM product, this elastic structure can automatically adapt to the size tolerance of product, for example, if the size of MIM product has certain manufacturing error or has slight thermal expansion in the sintering process, the spring can adjust the position of clamping plate through telescoping, ensure that the product is clamped stably, and the product will not be deformed or damaged due to the over-tight clamping force, which is very crucial to ensure the shape accuracy of the product in the sintering process, the connecting rod and the metal shell constitute a sliding structure, which not only ensures the normal telescoping of the spring, but also limits the movement direction of the clamping plate, so that the clamping plate only performs linear motion under the action of the spring, and the clamping force is accurately applied to the product.

[0016] 2.The utility model discloses a support assembly is provided, the support plate is set through the hoop and the support frame to constitute a sliding structure, so that the height of the support plate can be adjusted according to actual demand, when facing workpiece clamping and fixing assembly of different heights or MIM product of different sizes, the position of the support plate can be changed by sliding the hoop to better support the workpiece clamping and fixing assembly, this height adjusting function increases the flexibility and adaptability of the support assembly, and ensures that the whole jig can meet the requirements of various production conditions.

[0017] 3.The utility model discloses an auxiliary fixing assembly is provided, the inner thread rod is set through the buckle, the clamping structure of slot and support frame, so that the auxiliary fixing assembly can be closely connected with the support assembly, this connection mode can effectively resist external interference in the sintering process, and ensure that the auxiliary fixing assembly will not be easily loosened or displaced, for example, in the high-temperature sintering environment, factors such as vibration or thermal expansion of the equipment may affect the stability of the jig, and the clamping structure can ensure that the position of the auxiliary fixing assembly on the support frame is fixed, providing continuous and stable auxiliary fixing effect for MIM product, the friction between the friction block and the MIM product is one of the key factors for fixing the product, the position of the friction block can be adjusted by rotating the threaded rod, so that the pressure between the friction block and the product can be controlled, thereby optimizing the size of the friction, and appropriate friction can better fix the product, prevent the product from shaking and displacing in the sintering process, and further improve the quality and precision of product sintering. ACCURACY

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor intensity.

[0019] Figure 1It is the whole front view of the three-dimensional structure schematic diagram of the utility model.

[0020] Figure 2 It is the sectional structure schematic diagram of the utility model workpiece clamping and fixing assembly.

[0021] Figure 3 It is the three-dimensional structure schematic diagram of the utility model support assembly.

[0022] Figure 4 It is the three-dimensional structure schematic diagram of the utility model Figure 3 It is the enlarged structure schematic diagram of A place in the utility model.

[0023] Figure 5 It is the three-dimensional structure schematic diagram of the utility model auxiliary fixing assembly.

[0024] In the figure: 1, workpiece clamping and fixing assembly;2, support assembly;3, auxiliary fixing assembly;101, support rod;102, metal shell;103, spring;104, connecting rod;105, clamping plate;201, support frame;202, clamping groove;203, hoop;204, nut;205, bolt;206, support plate;301, buckle;302, inner thread rod;303, threaded rod;304, friction block. Specific embodiments

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment one

[0027] As Figure 1 shown, a kind of MIM product sintering auxiliary jig, including workpiece clamping and fixing assembly 1, support assembly 2, auxiliary fixing assembly 3.

[0028] Please refer to Figures 1 to 5The auxiliary jig for sintering MIM products includes a workpiece clamping and fixing assembly 1, a support assembly 2 installed at the bottom of the workpiece clamping and fixing assembly 1, and an auxiliary fixing assembly 3 installed at the top of the support assembly 2. The workpiece clamping and fixing assembly 1 includes a support rod 101, a metal shell 102 fixedly connected to the side of the support rod 101, a spring 103 fixedly connected to the inside of the metal shell 102, a connecting rod 104 fixedly connected to the end of the spring 103, and a clamping plate 105 fixedly connected to the end of the connecting rod 104. The support rod 101 and the metal shell 102 are integrally arranged, the metal shell 102 and the spring 103 are arranged in vertical coaxial arrangement, the connecting rod 104 and the metal shell 102 form an elastic structure through the spring 103, and the clamping plate 105 has elasticity due to the spring 103. When clamping the MIM product, the elastic structure can automatically adapt to the size tolerance of the product. For example, if there is a certain manufacturing error in the size of the MIM product or there is a slight thermal expansion during sintering, the spring 103 can adjust the position of the clamping plate 105 through expansion and contraction, ensuring that the product is stably clamped without causing deformation or damage to the product due to excessive clamping force. This is very important for ensuring the shape accuracy of the product during sintering. The sliding structure formed by the connecting rod 104 and the metal shell 102 not only ensures the normal expansion and contraction of the spring 103, but also limits the movement direction of the clamping plate 105. In this way, the clamping plate 105 only performs linear motion under the action of the spring 103, accurately applying clamping force to the product; the connecting rod 104 and the metal shell 102 are arranged in vertical coaxial arrangement, the connecting rod 104 and the metal shell 102 form a sliding structure, and the connecting rod 104 and the clamping plate 105 are integrally arranged.

[0029] Please refer to Figure 4 The auxiliary jig for sintering MIM products includes a workpiece clamping and fixing assembly 1, a support assembly 2 installed at the bottom of the workpiece clamping and fixing assembly 1, and an auxiliary fixing assembly 3 installed at the top of the support assembly 2. The workpiece clamping and fixing assembly 1 includes a support rod 101, a metal shell 102 fixedly connected to the side of the support rod 101, a spring 103 fixedly connected to the inside of the metal shell 102, a connecting rod 104 fixedly connected to the end of the spring 103, and a clamping plate 105 fixedly connected to the end of the connecting rod 104. The support rod 101 and the metal shell 102 are integrally arranged, the metal shell 102 and the spring 103 are arranged in vertical coaxial arrangement, the connecting rod 104 and the metal shell 102 form an elastic structure through the spring 103, and the clamping plate 105 has elasticity due to the spring 103. When clamping the MIM product, the elastic structure can automatically adapt to the size tolerance of the product. For example, if there is a certain manufacturing error in the size of the MIM product or there is a slight thermal expansion during sintering, the spring 103 can adjust the position of the clamping plate 105 through expansion and contraction, ensuring that the product is stably clamped without causing deformation or damage to the product due to excessive clamping force. This is very important for ensuring the shape accuracy of the product during sintering. The sliding structure formed by the connecting rod 104 and the metal shell 102 not only ensures the normal expansion and contraction of the spring 103, but also limits the movement direction of the clamping plate 105. In this way, the clamping plate 105 only performs linear motion under the action of the spring 103, accurately applying clamping force to the product; the connecting rod 104 and the metal shell 102 are arranged in vertical coaxial arrangement, the connecting rod 104 and the metal shell 102 form a sliding structure, and the connecting rod 104 and the clamping plate 105 are integrally arranged.

[0030] Please refer to Figure 5 The auxiliary fixing assembly 3 includes a buckle 301, the end of the buckle 301 is fixedly connected with an inner thread rod 302, the inner thread rod 302 is internally threadedly connected with a threaded rod 303, and the end of the threaded rod 303 is fixedly connected with a friction block 304. The inner thread rod 302 is provided with a clamping structure formed by the buckle 301, the clamping groove 202 and the support frame 201, so that the auxiliary fixing assembly 3 can be closely connected with the supporting assembly 2. This connection mode can effectively resist external interference during sintering, and ensure that the auxiliary fixing assembly 3 will not easily loosen or shift. For example, in a high-temperature sintering environment, factors such as equipment vibration or thermal expansion may affect the stability of the jig, but the clamping structure can ensure that the position of the auxiliary fixing assembly 3 on the support frame 201 is fixed, providing continuous and stable auxiliary fixing effect for the MIM product. The friction force between the friction block 304 and the MIM product is one of the key factors for fixing the product. By rotating the threaded rod 303 to adjust the position of the friction block 304, the pressure between the friction block 304 and the product can be controlled, thereby optimizing the size of the friction force. Suitable friction force can better fix the product, prevent the product from shaking and shifting during sintering, and further improve the quality and precision of product sintering. The inner thread rod 302 forms a clamping structure with the buckle 301, the clamping groove 202 and the support frame 201, the friction block 304 forms a sliding structure with the inner thread rod 302 through the threaded rod 303, and the threaded rod 303 and the inner thread rod 302 form a threaded structure.

[0031] Working principle: first rotate the bolt 205 and make the hoop 203 loose with the support frame 201, adjust the position of the support plate 206, after adjusting the support plate 206 to the appropriate position, rotate the bolt 205 again to fix, after the position of the support plate 206 is fixed, when the MIM workpiece is placed between the clamping plate 105, the workpiece exerts pressure on the clamping plate 105, so that the clamping plate 105 moves to both sides, the clamping plate 105 compresses the spring 103 through the connecting rod 104, and the spring 103 generates a reaction force proportional to the compression amount, which is transmitted back to the clamping plate 105 through the connecting rod 104, so that the clamping plate 105 exerts clamping force on the workpiece to clamp and fix the workpiece, and the integrated design of the support rod 101 and the metal shell 102 ensures the stability of the whole structure when bearing the clamping force. During the expansion and contraction of the spring 103, the vertical central axis of the metal shell 102 and the spring 103 coincides, so that the spring 103 is uniformly stressed, and the stable play of its elasticity is ensured. At the same time, the sliding structure composed of the connecting rod 104 and the metal shell 102 limits the movement direction of the connecting rod 104, so that the clamping plate 105 can only move in the direction perpendicular to the support rod 101, ensuring the accurate application of clamping force and improving the accuracy and reliability of clamping. Then put the support frame 201 with the workpiece into the sintering device, then connect the auxiliary fixing assembly 3 on the support frame 201 through the buckle 301, rotate the threaded rod 303 and the friction block 304 to extend, so that the friction block 304 is attached to the inner surface of the sintering device for auxiliary fixing, then open the sintering device to sinter the workpiece, and all the materials are high-temperature-resistant materials, which can avoid damage during sintering.

[0032] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A MIM product sintering assist jig, characterized by: Including workpiece clamping and fixing assembly (1), the bottom of workpiece clamping and fixing assembly (1) is provided with support assembly (2), and the top of support assembly (2) is provided with auxiliary fixing assembly (3); The workpiece clamping and fixing assembly (1) comprises a support rod (101), a metal shell (102) is fixedly connected to the side of the support rod (101), a spring (103) is fixedly connected to the inside of the metal shell (102), a connecting rod (104) is fixedly connected to the end of the spring (103), and a clamping plate (105) is fixedly connected to the end of the connecting rod (104).

2. The sintering aid jig for MIM products according to claim 1, characterized in that: The support rod (101) and the metal shell (102) are integrally arranged, the metal shell (102) and the spring (103) are vertically coaxial, and the connecting rod (104) and the metal shell (102) form an elastic structure through the spring (103).

3. The sintering aid jig for MIM products according to claim 1, characterized in that: The connecting rod (104) and the metal shell (102) are vertically coaxial, the connecting rod (104) and the metal shell (102) form a sliding structure, and the connecting rod (104) and the clamping plate (105) are integrally arranged.

4. The sintering aid jig for MIM products according to claim 1, characterized in that: The support assembly (2) comprises a support frame (201), a clamping groove (202) is formed in the top end of the support frame (201), a hoop (203) is slidably connected to the outer wall of the support frame (201), a support plate (206) is fixed to one side of the hoop (203), a nut (204) is fixedly connected to the other side of the hoop (203), and a bolt (205) is threadedly connected in the nut (204).

5. The sintering aid jig for MIM products according to claim 4, characterized in that: The support plate (206) and the support frame (201) form a sliding structure through the hoop (203), the hoop (203) and the nut (204) are integrally arranged, and the bolt (205) is threadedly connected in the nut (204).

6. The sintering aid jig for MIM products according to claim 1, characterized in that: The auxiliary fixing assembly (3) comprises a buckle (301), an inner thread rod (302) is fixedly connected to the end of the buckle (301), a threaded rod (303) is threadedly connected to the inside of the inner thread rod (302), and a friction block (304) is fixedly connected to the end of the threaded rod (303).

7. The sintering aid jig for MIM products according to claim 6, characterized in that: The inner thread rod (302), the buckle (301) and the support frame (201) form a clamping structure, the friction block (304), the threaded rod (303) and the inner thread rod (302) form a sliding structure, and the threaded rod (303) and the inner thread rod (302) form a threaded structure.

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