Fixture for guaranteeing form and location tolerance of processed product

Abstract

The utility model discloses a fixture for guaranteeing form and location tolerance of a processed product, and particularly relates to the technical field of product fixtures, the fixture comprises a pressing plate assembly and a thickened pressing plate, a processing workpiece is arranged at the bottom of the pressing plate assembly, the thickened pressing plate is arranged on one side of the top of the pressing plate assembly, a pressing plate middle column is arranged at the bottom end of the center of the thickened pressing plate, and the pressing plate middle column is connected with the pressing plate assembly. A base is arranged at the bottom end of the machining workpiece, and a square-end flange positioning plate and a round-end flange positioning plate are arranged on the two sides, close to the bottom of the machining workpiece, of the top of the base respectively. The fixture has the advantages that a workpiece can be conveniently limited, rebound deformation after the workpiece is clamped is reduced, the workpiece is kept fixed, accumulated out-of-tolerance of a product in multi-procedure machining can be avoided through extrusion clamping, and then the stability of a product body in the machining process can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of product fixtures, in particular to a fixture used for ensuring the shape and position tolerance of products after processing. Background Art

[0002] A fixture is a device used to fix the workpiece in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. It is also called a fixture. In a broad sense, any device used to quickly, conveniently and safely install the workpiece in any process can be called a fixture. A fixture usually consists of a positioning element, a clamping device, a tool guide element, a dividing device, a connecting element and a clamp body.

[0003] However, in actual use, due to the large number of rotating shapes in the product's own structure, the initial review was completed using a CNC lathe and a machining center. However, after processing, the product required strict form and position tolerances, and the control of the accuracy of each sequence of tooling and the reference dimensions needed to be more stringent. After the finished products were inspected, the processing dimensions and form and position tolerances could not be stably controlled within the requirements of the drawings, resulting in unstable processing quality control during the workpiece processing process, resulting in waste of workpieces and increased production and processing costs. Utility Model Content

[0004] The utility model aims to provide a clamp for ensuring the shape and position tolerance of products after processing, which solves the problem of needing to stably control the product tolerance and realizing stable clamping.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixture for ensuring the shape and position tolerance of a product after processing, comprising a pressure plate assembly and a thickened pressure plate, the processing workpiece is arranged at the bottom of the pressure plate assembly, a thickened pressure plate is arranged on one side of the top of the pressure plate assembly, a pressure plate middle column is arranged at the bottom end of the center of the thickened pressure plate, a pressure plate tail column is arranged at the bottom of one end of the thickened pressure plate away from the pressure plate assembly, a base is arranged at the bottom end of the processing workpiece, and a square end flange positioning plate and a round end flange positioning plate are respectively arranged on both sides of the top of the base close to the bottom of the processing workpiece;

[0006] The clamping plate assembly for clamping includes an extrusion plate and a fixed connection plate. The bottom of the extrusion plate is fixedly connected with a clamping plate, and both sides of the clamping plate are fixedly connected with fixed connection plates at both ends of the workpiece to be processed.

[0007] Preferably, flange rings are respectively provided at both ends of the workpiece, and the outer wall of the flange ring at one end is square, and the outer wall of the flange ring at the other end is circular, and the square end flange positioning plate and the round end flange positioning plate at both ends of the bottom of the workpiece are respectively provided with fitting grooves corresponding to the flange rings at both ends of the workpiece.

[0008] Preferably, the top of the base is fixed to the square end flange positioning plate, and one end of the top of the base is fixed to the bottom of the middle column of the pressure plate. A clamping screw is provided on the top of the middle column of the pressure plate, and the top outer wall of the clamping screw passes through the interior of the thickened pressure plate and is rotatably connected with a nut.

[0009] Preferably, the top of the middle column of the pressure plate does not contact the thickened pressure plate, the center of the top of the middle column of the pressure plate is fixed to the clamping screw, a connecting hole that penetrates the clamping screw is opened inside the center of the thickened pressure plate, and the bottom of the nut fits with the top of the thickened pressure plate.

[0010] Preferably, the bottom of the fixed connecting plates on both sides of the clamping plate are respectively provided with grooves corresponding to the flange rings at both ends of the workpiece, the extrusion plate is fixed to the top of the clamping plate by bolts, and the extrusion plate is fixed to one end of the thickened pressure plate.

[0011] Preferably, the top of the base is fixed to the bottom of the middle column of the pressure plate by bolts, a bottom fixing plate is provided at the bottom end of the tail column of the pressure plate, and multiple positioning pin holes are provided on the outer walls of the base and the bottom fixing plate.

[0012] Preferably, positioning blocks are fitted on both side walls of the bottom end of the workpiece close to the square end flange positioning plate, and a groove corresponding to the positioning block is opened on the top side of the square end flange positioning plate, and one side of the positioning block is fixedly connected to the square end flange positioning plate through the groove.

[0013] Preferably, the bottom of the pressure plate tail column is fixedly connected to the bottom fixing plate by bolts, and the top of the pressure plate tail column is at the same height as the top of the extrusion plate, and the top of the pressure plate tail column fits with one end of the bottom of the base.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. According to the evaluation and analysis of product shape, the outer blank of the workpiece is reasonably used for positioning and clamping, and the strict position after product processing is avoided to form three major points of positioning, reduce the rebound deformation of the workpiece after clamping, and the overall product process is clamped at one time and all required processing dimensions are completed on high-precision horizontal machining equipment, which can avoid the cumulative deviation of the product in multiple processing steps, and then ensure the stability of the product body during processing, and ensure the safety of the product body during processing.

[0016] 2. Turn the nut to move it toward one end of the clamping screw, thereby squeezing the thickened pressing plate to make the thickened pressing plate work and clamp the pressing plate assembly on the top of the workpiece. The thickened pressing plate can fix the workpiece more effectively after being clamped, and finally complete the clamping and fixing of the product. Since the height of the tail column of the pressing plate is consistent with the height of the extrusion plate at the front end of the thickened pressing plate, the thickened pressing plate can be kept horizontal to avoid tilting, so that the front and rear ends are always kept under uniform force and extrusion after clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the side structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the top structure of the base of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the top of the base and the flange positioning plate of the utility model;

[0022] Figure 5 It is a schematic diagram of the internal structure of the pressing plate assembly of the utility model.

[0023] Description of reference numerals:

[0024] 1. Processing workpiece; 2. Press plate assembly; 201. Extrusion plate; 202. Fixed connecting plate; 203. Clamping plate; 3. Thickened press plate; 4. Press plate middle column; 401. Clamping screw; 402. Nut; 5. Press plate tail column; 501. Bottom fixing plate; 6. Square end flange positioning plate; 601. Fitting groove; 7. Base; 8. Positioning pin hole; 9. Round end flange positioning plate; 10. Positioning block. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] The utility model provides Figure 1-5A fixture for ensuring the shape and position tolerance of the product after processing is shown, including a pressure plate assembly 2 and a thickened pressure plate 3, the workpiece 1 is arranged at the bottom of the pressure plate assembly 2, and a thickened pressure plate 3 is arranged on one side of the top of the pressure plate assembly 2, and a pressure plate middle column 4 is arranged at the bottom end of the center of the thickened pressure plate 3, and a pressure plate tail column 5 is arranged at the bottom of the end of the thickened pressure plate 3 away from the pressure plate assembly 2. A base 7 is arranged at the bottom end of the workpiece 1, and a square end flange positioning plate 6 and a round end flange positioning plate 9 are respectively arranged on both sides of the top of the base 7 near the bottom of the workpiece 1; the pressure plate assembly 2 for clamping includes an extrusion plate 201 and a fixed connecting plate 202, the bottom of the extrusion plate 201 is fixedly connected with a clamping plate 203, and both sides of the clamping plate 203 are fixedly connected with fixed connecting plates 202 at the two ends of the workpiece 1.

[0027] like Figure 1-5 As shown, flange rings are respectively provided at both ends of the workpiece 1 for processing, and the outer wall of the flange ring at one end is square, and the outer wall of the flange ring at the other end is circular, and the square end flange positioning plate 6 and the round end flange positioning plate 9 at both ends of the bottom of the workpiece 1 are respectively provided with fitting grooves 601 corresponding to the flange rings at both ends of the workpiece 1 on the top, so as to facilitate connection and clamping.

[0028] like Figure 1 , Figure 3 As shown, the top of the base 7 is fixed to the bottom of the middle column 4 of the pressure plate by bolts, and a bottom fixing plate 501 is provided at the bottom end of the tail column 5 of the pressure plate. The outer walls of the base 7 and the bottom fixing plate 501 are provided with multiple positioning pin holes 8, which can be installed and fixed through the positioning pin holes 8.

[0029] like Figure 3 , Figure 4 As shown, positioning blocks 10 are fitted on both side walls of the bottom of one end of the workpiece 1 close to the square-end flange positioning plate 6, and a groove corresponding to the positioning block 10 is provided on the top side of the square-end flange positioning plate 6, and one side of the positioning block 10 is fixedly connected to the square-end flange positioning plate 6 through the groove. The workpiece 1 is moved so that one end of it is close to the position of the positioning block 10, thereby realizing the XY axis positioning of the workpiece 1.

[0030] When in use, the device cooperates with the positioning groove on the machine tool workbench under the cooperation of the positioning pin and the positioning pin hole 8, completes the placement of the device fixture in the position direction of the machine tool workbench, and can place the corresponding processing workpiece 1 on the top of the base 7, and then through the fitting grooves 601 on the top of the square end flange positioning plate 6 and the round end flange positioning plate 9, the flange rings at both ends of the processing workpiece 1 are placed correspondingly, and then the processing workpiece 1 is manually moved so that one end of it is close to the position of the positioning block 10, thereby realizing the XY axis positioning of the processing workpiece 1, and then the top pressure plate assembly 2 is placed to the top position of the processing workpiece 1, so that the groove at the bottom of the clamping plate 203 and the processing workpiece 1 correspond to each other to achieve limit.

[0031] like Figure 1 , Figure 3 As shown, the top of the base 7 is fixed to the square end flange positioning plate 6, and one end of the top of the base 7 is fixed to the bottom of the middle column 4 of the pressure plate. A clamping screw 401 is provided on the top of the middle column 4 of the pressure plate, and the top outer wall of the clamping screw 401 penetrates through the inside of the thickened pressure plate 3 and is rotatably connected with a nut 402. The top of the middle column 4 of the pressure plate does not contact the thickened pressure plate 3, and the center of the top of the middle column 4 of the pressure plate is fixed to the clamping screw 401. A connecting hole that penetrates the clamping screw 401 is provided inside the center of the thickened pressure plate 3, and the bottom of the nut 402 is fitted with the top of the thickened pressure plate 3. Through the support of the middle column 4 of the pressure plate and the tail column 5 of the pressure plate installed on the base 7, the nut 402 is rotated to move it toward one end of the clamping screw 401, thereby squeezing the thickened pressure plate 3.

[0032] like Figure 2 , Figure 5 As shown, the bottom of the fixed connecting plates 202 on both sides of the clamping plate 203 are respectively provided with grooves corresponding to the flange rings at both ends of the processed workpiece 1, the extrusion plate 201 is fixed to the top of the clamping plate 203 by bolts, and the extrusion plate 201 is fixed to one end of the thickened pressure plate 3, so that the groove at the bottom of the clamping plate 203 and the processed workpiece 1 correspond to each other and fit each other.

[0033] like Figure 1 , Figure 3 As shown, the bottom of the pressure plate tail column 5 is fixedly connected to the bottom fixing plate 501 by bolts, and the top of the pressure plate tail column 5 is at the same height as the top of the extrusion plate 201, and the top of the pressure plate tail column 5 is in contact with one end of the bottom of the base 7. Since the height of the pressure plate tail column 5 is consistent with the height of the extrusion plate 201 at the front end of the thickened pressure plate 3, the thickened pressure plate 3 is ensured to be horizontal and avoid tilting.

[0034] The installation direction of the pressure plate assembly 2 is distinguished according to the appearance shape of the flange rings at both ends of the workpiece 1 and the bottom groove of the clamping plate 203. After installation, the extrusion plate 201 is always in a state basically parallel to the work surface, and then supported by the pressure plate middle column 4 and the pressure plate tail column 5 installed on the base 7, and then the nut 402 is rotated to move it toward one end of the clamping screw 401, and then the thickened pressure plate 3 is squeezed to make the thickened pressure plate 3 work, and the pressure plate assembly 2 on the top of the workpiece 1 is clamped by the thickened pressure plate 3 to more effectively fix the workpiece 1, and finally complete the clamping and fixing of the product. Since the height of the pressure plate tail column 5 is consistent with the height of the extrusion plate 201 at the front end of the thickened pressure plate 3, the thickened pressure plate 3 can be ensured to be horizontal and avoid tilting, so that the extrusion force at the front and rear ends is always kept uniform after clamping.

[0035] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fixture for ensuring the shape and position tolerance of a product after processing, characterized in that: The invention comprises a pressure plate assembly (2) and a thickened pressure plate (3), wherein the workpiece (1) is arranged at the bottom of the pressure plate assembly (2), a thickened pressure plate (3) is arranged on one side of the top of the pressure plate assembly (2), a pressure plate middle column (4) is arranged at the bottom of the center of the thickened pressure plate (3), a pressure plate tail column (5) is arranged at the bottom of one end of the thickened pressure plate (3) away from the pressure plate assembly (2), a base (7) is arranged at the bottom of the workpiece (1), and a square end flange positioning plate (6) and a round end flange positioning plate (9) are respectively arranged on both sides of the top of the base (7) close to the bottom of the workpiece (1); The clamping plate assembly (2) comprises an extrusion plate (201) and a fixed connection plate (202); the bottom of the extrusion plate (201) is fixedly connected to a clamping plate (203), and both sides of the clamping plate (203) are fixedly connected to the fixed connection plates (202) at both ends of the workpiece (1) being processed.

2. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 1, characterized in that: The workpiece (1) is provided with flange rings at both ends, and the outer wall of the flange ring at one end is square and the outer wall of the flange ring at the other end is round. The square end flange positioning plate (6) and the round end flange positioning plate (9) at the bottom ends of the workpiece (1) are provided with fitting grooves (601) corresponding to the flange rings at both ends of the workpiece (1) at the top.

3. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 1, characterized in that: The top of the base (7) is fixed to the square end flange positioning plate (6), and one end of the top of the base (7) is fixed to the bottom of the middle column (4) of the pressure plate. A clamping screw (401) is provided on the top of the middle column (4) of the pressure plate, and the top outer wall of the clamping screw (401) passes through the inside of the thickened pressure plate (3) and is rotatably connected to a nut (402).

4. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 3, characterized in that: The top of the intermediate column (4) of the pressure plate does not contact the thickened pressure plate (3); the center of the top of the intermediate column (4) of the pressure plate is fixed to the clamping screw (401); a connecting hole that penetrates the clamping screw (401) is provided inside the center of the thickened pressure plate (3); and the bottom of the nut (402) is in contact with the top of the thickened pressure plate (3).

5. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 1, characterized in that: The bottoms of the fixed connection plates (202) on both sides of the clamping plate (203) are respectively provided with slots corresponding to the flange rings at both ends of the workpiece (1), the extrusion plate (201) is fixed to the top of the clamping plate (203) by bolts, and the extrusion plate (201) is fixed to one end of the thickened pressing plate (3).

6. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 1, characterized in that: The top of the base (7) is fixed to the bottom of the middle column (4) of the pressure plate by bolts, a bottom fixing plate (501) is provided at the bottom end of the tail column (5) of the pressure plate, and the outer walls of the base (7) and the bottom fixing plate (501) are both provided with a plurality of positioning pin holes (8).

7. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 1, characterized in that: Positioning blocks (10) are fitted on both side walls of the bottom of one end of the workpiece (1) close to the square-end flange positioning plate (6), a groove corresponding to the positioning block (10) is provided on one side of the top of the square-end flange positioning plate (6), and one side of the positioning block (10) is fixedly engaged with the square-end flange positioning plate (6) through the groove.

8. A fixture for ensuring the shape and position tolerance of a product after processing according to claim 6, characterized in that: The bottom of the pressure plate tail column (5) is fixedly connected to the bottom fixing plate (501) by bolts, and the top of the pressure plate tail column (5) is at the same height as the top of the extrusion plate (201), and the top of the pressure plate tail column (5) fits with one end of the bottom of the base (7).

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