A special-shaped casting machining clamp

Abstract

The utility model relates to a special-shaped casting machining clamp, effective solution special-shaped workpiece side face clamping tool clamping efficiency low problem, the technical scheme that solves includes bottom plate, is equipped with two groups of clamping unit on the bottom plate, each clamping unit includes a strip plate along the front -back direction setting, and the strip plate can slide left and right on the bottom plate, and the upper surface on the strip plate rotatably installs a plurality of clamping roller, and the clamping roller is evenly distributed along the front -back direction, and each clamping roller is composed of a vertical cylinder and a vertical mandrel, and the cylinder is eccentric fixed with the mandrel, and the lower end of the mandrel rotatably installs on the strip plate, and the mandrel is equipped with torsion spring, and under the action of torsion spring, the side of cylinder farthest from the mandrel axis faces inwards, the strip plate is equipped with two front -back direction clamps, and two clamps are arranged left and right symmetry, and the inside of each clamp is opened a plurality of arc grooves corresponding with the mandrel one to one, the utility model can automatically adapt the radian of workpiece, and the clamping stable efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of machining tooling, specifically a jig for machining irregularly shaped castings. Background Technology

[0002] The reel arm of a harvester is usually a curved casting with a certain curvature. After casting, it needs to be machined by grinding and polishing. However, since there is no suitable reference plane for clamping and fixing, it is usually fixed by pressing the upper surface with multiple clamping blocks. However, this method of pressing the upper surface not only affects the machining of the upper surface, but also makes the workpiece prone to movement under the action of horizontal machining force during machining. The utility model patent with application number: CN201920297210.X uses multiple clamping platforms to clamp irregularly shaped workpieces at multiple points on the side. Although this method can completely expose the top surface of the workpiece and prevent horizontal displacement, the clamping is unstable if there are few clamping points, and the clamping efficiency is very slow because each clamping point needs to be clamped one by one if there are many clamping points. Summary of the Invention

[0003] This utility model provides a jig for machining irregularly shaped castings, aiming to solve the problem of low clamping efficiency of side clamping fixtures for irregularly shaped workpieces.

[0004] The technical solution includes a base plate with two sets of clamping units arranged symmetrically from left to right. Each clamping unit includes a strip plate arranged in the front-to-back direction. The strip plate is placed on the base plate and can slide left and right on the base plate. Several clamping rollers are rotatably mounted on the upper surface of the strip plate. The clamping rollers are evenly distributed in the front-to-back direction. Each clamping roller consists of a vertical cylinder and a vertical mandrel. The cylinder and mandrel are eccentrically fixed. The lower end of the mandrel is rotatably mounted on the strip plate. A torsion spring is mounted on the mandrel. Under the action of the torsion spring, the side of the cylinder furthest from the mandrel axis faces inward. The strip plate has two clamping plates arranged symmetrically from left to right in the front-to-back direction. The inner side of each clamping plate has multiple arc-shaped grooves that correspond one-to-one with the mandrel.

[0005] A left-right directional lead screw is rotatably mounted on the base plate. The lead screw passes through two strip plates, and the threads at the mating points of the lead screw and the two strip plates rotate in opposite directions.

[0006] A bolt running in the left-right direction passes between the two clamping plates of each clamping unit. The bolt is threaded into the clamping plate located on its head side, and the bolt is not threaded into the other clamping plate.

[0007] At least two bolts are evenly distributed along the length of the clamping plate.

[0008] Each of the aforementioned clamps has a clearance groove on the lower surface near the mandrel.

[0009] The base plate is provided with guide rods in the left and right directions, and the guide rods pass through the two strip plates.

[0010] The base plate is provided with several support rods in the left and right directions. The left and right ends of the support rods are fixed to the base plate by vertical rods. The support rods are evenly distributed in the front and back directions, and the upper end of the cylinder extends out from the gaps between the support rods.

[0011] This invention can automatically adapt to the curvature of the workpiece by rotating several eccentric cylinders, thereby enabling stable clamping of irregularly shaped workpieces. It is versatile for irregularly shaped workpieces and does not require individual adjustment of the cylinder positions, resulting in high clamping efficiency. Attached Figure Description

[0012] Figure 1 This is a top view of the present invention.

[0013] Figure 2 This is the main view of this utility model.

[0014] Figure 3 The three-dimensional representation of this utility model Figure 1 .

[0015] Figure 4 The three-dimensional representation of this utility model Figure 2 .

[0016] Figure 5 This is a perspective view of the present invention after the support rod has been removed.

[0017] Figure 6 for Figure 2 A magnified view of position A in the middle. Detailed Implementation

[0018] Referring to the accompanying drawings, this utility model includes a base plate 1, on which two sets of clamping units are provided. The two sets of clamping units are symmetrically arranged left and right. The two sets of clamping units can clamp the workpiece by moving towards the center. Each set of clamping units includes a strip plate 2 arranged in the front-back direction. The strip plate 2 is placed on the base plate 1 and can slide left and right on the base plate 1. Several clamping rollers are rotatably mounted on the upper surface of the strip plate 2. The clamping rollers are evenly distributed in the front-back direction. Each clamping roller consists of a vertical cylinder 3 and a vertical mandrel 4. The cylinder 3 and the mandrel 4 are eccentrically fixed. The lower end of the mandrel 4 is rotatably mounted on the strip plate 2. The mandrel 4 is equipped with... The torsion spring 5, under the action of the torsion spring 5, the side of the cylinder 3 furthest from the axis of the mandrel 4 faces inward; when the two sets of clamping units move inward and the cylinder 3 contacts the left and right sides of the workpiece, the eccentric cylinder 3 can rotate around the mandrel 4, so that multiple cylinders 3 automatically adapt to the side of the workpiece and contact the side of the workpiece at the same time; the strip plate 2 is provided with two clamping plates 6 in the front and back directions, the two clamping plates 6 are arranged symmetrically on the left and right, and each clamping plate 6 has multiple arc-shaped grooves 7 on its inner side that correspond one-to-one with the mandrel 4. The two clamping plates 6 can move towards the middle, so that the left and right arc-shaped grooves 7 correspond one-to-one to clamp all the mandrels 4, thereby fixing the clamping roller and completing the clamping of the workpiece.

[0019] A left-right screw 8 is rotatably mounted on the base plate 1. The screw 8 passes through two strip plates 2. The threads of the screw 8 and the two strip plates 2 are opposite in direction. When the screw 8 is rotated, the two strip plates 2 can move towards each other or away from each other at the same time, thereby realizing the clamping and releasing of the workpiece by the clamping unit.

[0020] A bolt 9 runs through the two clamping plates 6 of each clamping unit in the left-right direction. The bolt 9 is threaded to the clamping plate 6 located on its head side, and the bolt 9 is not threaded to the other clamping plate 6. When the bolt 9 is rotated, the two clamping plates 6 can be brought closer to each other, thereby clamping the mandrel 4 between the two clamping plates 6.

[0021] At least two bolts 9 are evenly distributed along the length of the clamping plate 6 to ensure that each mandrel 4 is clamped.

[0022] Each of the clamping plates 6 has a clearance groove 10 on the lower surface near the spindle 4 for mounting the torsion spring 5.

[0023] The base plate 1 is provided with a guide rod 11 in the left and right direction. The guide rod 11 passes through the two strip plates 2 and guides the left and right movement of the strip plates 2, making the left and right movement of the strip plates 2 more stable.

[0024] The base plate 1 is provided with several left and right support rods 12. The left and right ends of the support rods 12 are fixed to the base plate 1 by vertical rods. The support rods 12 are evenly distributed in the front and back direction. The upper end of the cylinder 3 extends out from the gap of the support rods 12. The workpiece is placed on the support rods 12, which can avoid interference between the workpiece and the strip plate 2, the lead screw 8, the guide rod 11, etc.

[0025] In use, the workpiece is placed on a workbench composed of multiple support rods 12 and positioned between two sets of clamping units. Then, the lead screw 8 is rotated to move the two sets of clamping units towards the center. The cylinders 3 of the two sets of clamping units will contact the side of the workpiece one after another. The cylinder 3 that contacts the workpiece first will be pushed to overcome the torsion spring 5 and rotate around the spindle 4 until all the cylinders 3 of the two sets of clamping units are in contact with the workpiece. Then, the bolts 9 are tightened to clamp the spindle 4 with the two clamping plates 6, locking the clamping rollers. The cylinders 3 will no longer rotate. At this time, the cylinders 3 in the two sets of clamping units automatically adapt to the side curvature of the workpiece. Then, the lead screw 8 is rotated further to increase the clamping force of the two sets of clamping units on the workpiece, firmly fixing the workpiece on the workbench.

[0026] This invention can automatically adapt to the curvature of the workpiece by rotating several eccentric cylinders 3, thereby enabling stable clamping of irregularly shaped workpieces. It is versatile for irregularly shaped workpieces and does not require individual adjustment of the position of each cylinder 3, resulting in high clamping efficiency.

Claims

1. A jig for machining irregularly shaped castings, comprising a base plate (1), wherein two sets of clamping units are provided on the base plate (1), the two sets of clamping units being symmetrically arranged left and right, characterized in that, Each clamping unit includes a strip plate (2) arranged in the front-back direction. The strip plate (2) is placed on the base plate (1) and can slide left and right on the base plate (1). Several clamping rollers are rotatably mounted on the upper surface of the strip plate (2). The clamping rollers are evenly distributed in the front-back direction. Each clamping roller consists of a vertical cylinder (3) and a vertical spindle (4). The cylinder (3) and the spindle (4) are eccentrically fixed. The lower end of the spindle (4) is rotatably mounted on the strip plate (2). A torsion spring (5) is mounted on the spindle (4). Under the action of the torsion spring (5), the side of the cylinder (3) furthest from the axis of the spindle (4) faces inward. Two clamping plates (6) are provided on the strip plate (2) in the front-back direction. The two clamping plates (6) are arranged symmetrically left and right. Each clamping plate (6) has multiple arc grooves (7) on its inner side that correspond one-to-one with the spindle (4).

2. The irregular casting machining fixture according to claim 1, characterized in that, A left-right screw (8) is rotatably mounted on the base plate (1). The screw (8) passes through two strip plates (2), and the threads at the joints of the screw (8) and the two strip plates (2) are opposite in direction.

3. The irregular casting machining fixture according to claim 1, characterized in that, A bolt (9) in the left-right direction passes through the two clamping plates (6) of each clamping unit. The bolt (9) is threadedly engaged with the clamping plate (6) located on its head side, and the bolt (9) is not threadedly engaged with the other clamping plate (6).

4. A jig for machining irregularly shaped castings according to claim 3, characterized in that, The bolts (9) are evenly distributed in at least two along the length of the clamp (6).

5. A jig for machining irregularly shaped castings according to claim 1, characterized in that, Each of the clamps (6) has a clearance groove (10) on the lower surface near the mandrel (4).

6. A jig for machining irregularly shaped castings according to claim 1, characterized in that, The base plate (1) is provided with a guide rod (11) in the left and right directions, and the guide rod (11) passes through two strip plates (2).

7. A jig for machining irregularly shaped castings according to claim 1, characterized in that, The bottom plate (1) is provided with several left and right support rods (12) above it. The left and right ends of the support rods (12) are fixed to the bottom plate (1) by vertical rods. The support rods (12) are evenly distributed in the front and back direction. The upper end of the cylinder (3) extends out from the gap of the support rods (12).

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