Automatic clamping device for machine tool workpiece

Abstract

An automatic clamping device for machine tool workpieces comprises a cushion block arranged in the middle of a workbench and a center pressing oil cylinder arranged above the cushion block, first supporting oil cylinders are arranged on the two sides of the cushion block in the length direction, second supporting oil cylinders are arranged on the two sides of the cushion block in the width direction, first pressing oil cylinders are correspondingly arranged above the first supporting oil cylinders, and second pressing oil cylinders are correspondingly arranged above the second supporting oil cylinders. And a second pressing oil cylinder is correspondingly arranged above the second supporting oil cylinder. The device is used for replacing manual work of increasing or reducing equal-height cushion blocks, after the size of a workpiece is input into a system, the system automatically calculates and determines whether the equal-height cushion blocks are needed or not, and the workpiece clamping efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to an automatic clamping device for machine tool workpieces. Background Art

[0002] Currently, machine tool workpiece clamping devices consist of a pad mounted on the worktable and a central clamping cylinder located above the pad. The pad is used to elevate the workpiece, while the central clamping cylinder is used to clamp it. Due to the varying sizes of workpieces, the pad at the bottom of the workpiece can only be set to fit the smallest workpiece. If a large workpiece is clamped, the pad is too small, and the central clamping cylinder only acts on the center of the workpiece, making it prone to slippage and deformation during machining. Currently, workers manually add pads of the same height to the bottom of the workpiece based on its size, but this method is inefficient. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide an automatic clamping device for machine tool workpieces to improve the efficiency of workpiece clamping.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: an automatic clamping device for machine tool workpieces, comprising a pad block arranged in the middle of the workbench and a central clamping cylinder arranged above the pad block, a first supporting oil cylinder is provided on both sides of the length direction of the pad block, a second supporting oil cylinder is provided on both sides of the width direction of the pad block, a first clamping oil cylinder is provided above the first supporting oil cylinder, and a second clamping oil cylinder is provided above the second supporting oil cylinder. Principle of the utility model: The device is used to replace the work of manually adding or reducing contour blocks. After the size of the workpiece is input into the system, the system automatically calculates and determines whether contour blocks are needed; when processing small workpieces, only the center block and the center clamping cylinder are used to clamp the workpiece; when the length of the workpiece exceeds the preset workpiece length, the system automatically energizes the solenoid valve of the hydraulic station, and passes hydraulic oil to the first supporting cylinder and the first clamping cylinder in the front and rear directions, and the two first supporting cylinders extend to the same height as the block and support the workpiece, and the two corresponding first clamping cylinders extend and clamp the workpiece; when the width of the workpiece exceeds the preset workpiece width, the system automatically energizes the solenoid valve of the hydraulic station, and passes hydraulic oil to the second supporting cylinder and the second clamping cylinder in the left and right directions, and the two second supporting cylinders extend to the same height as the block and support the workpiece, and the two corresponding second clamping cylinders extend and clamp the workpiece.

[0005] As an improvement, the workbench is provided with a pad, the pad block is arranged in the middle of the pad, the pad block and the pad are an integrated structure, and the first supporting oil cylinder and the second supporting oil cylinder are arranged on the pad.

[0006] As an improvement, the first supporting oil cylinder includes a first oil chamber provided on the pad, a first oil seal cooperating with the first oil chamber, and a first piston rod provided in the first oil chamber; the second supporting oil cylinder includes a second oil chamber provided on the pad, a second oil seal cooperating with the second oil chamber, and a second piston rod provided in the second oil chamber.

[0007] As an improvement, the distance between the two first supporting cylinders is greater than the distance between the two second supporting cylinders.

[0008] As an improvement, the maximum stroke of the first supporting oil cylinder and the second supporting oil cylinder is the same height as the cushion block.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The device is used to replace the manual work of adding or reducing equal-height blocks. After the workpiece size is entered into the system, the system automatically calculates and determines whether equal-height blocks are needed, thereby improving the efficiency of workpiece clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of clamping small workpieces.

[0012] Figure 2 Preset workpiece clamping diagram for length.

[0013] Figure 3 This is a schematic diagram of clamping a workpiece with an over-width preset. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the accompanying drawings.

[0015] like Figures 1 to 3As shown, an automatic clamping device for machine tool workpieces includes a pad 11 located in the middle of a workbench and a central clamping cylinder 2 located above the pad 11. The pad 11 corresponds to the position of the central clamping cylinder 2. First support cylinders 5 are provided on both sides of the pad 11 in the longitudinal direction, and second support cylinders 7 are provided on both sides of the pad 11 in the width direction. When the piston rods of the first support cylinder 5 and the second support cylinder 7 are extended to their maximum stroke, the tops of the piston rods are at the same height as the pad 11. A first clamping cylinder 6 is provided above the first support cylinder 5, and a second clamping cylinder 8 is provided above the second support cylinder 7. The support cylinders and the clamping cylinders cooperate to clamp the workpiece. A pad 1 is provided on the workbench, and the pad 11 is provided in the middle of the pad 1. The pad 11 and the pad 1 are either integral or separate structures. The first support cylinder 5 and the second support cylinder 7 are provided on the pad 1. The first supporting oil cylinder 5 includes a first oil chamber provided on the pad 1, a first oil seal cooperating with the first oil chamber, and a first piston rod provided in the first oil chamber; the second supporting oil cylinder 7 includes a second oil chamber provided on the pad 1, a second oil seal cooperating with the second oil chamber, and a second piston rod provided in the second oil chamber.

[0016] Principle of the utility model: The device is used to replace the work of manually adding or reducing contour blocks 11. After the size of the workpiece is input into the system, the system automatically calculates and determines whether contour blocks are needed; when processing small workpieces, only the center block 11 and the center clamping cylinder 2 are used to clamp the workpiece; when the length direction of the workpiece exceeds the preset workpiece length, the system automatically energizes the hydraulic station solenoid valve, and passes hydraulic oil to the first supporting oil cylinder 5 and the first clamping oil cylinder 6 in the front and rear directions, and the two first supporting oil cylinders 5 piston rods extend to the same height as the block 11 and support the workpiece, and the two corresponding first clamping oil cylinders 6 extend and clamp the workpiece; when the width direction of the workpiece exceeds the preset workpiece width, the system automatically energizes the hydraulic station solenoid valve, and passes hydraulic oil to the second supporting oil cylinder 7 and the second clamping oil cylinder 8 in the left and right directions, and the two second supporting oil cylinders 7 piston rods extend to the same height as the block 11 and support the workpiece, and the two corresponding second clamping oil cylinders 8 extend and clamp the workpiece.

Claims

1. An automatic clamping device for a machine tool workpiece, comprising a pad located in the middle of a workbench and a central clamping cylinder located above the pad, characterized in that: A first supporting oil cylinder is provided on both sides of the cushion block in the length direction, and a second supporting oil cylinder is provided on both sides of the cushion block in the width direction. A first clamping oil cylinder is provided above the first supporting oil cylinder, and a second clamping oil cylinder is provided above the second supporting oil cylinder.

2. The automatic clamping device for machine tool workpieces according to claim 1, characterized in that: A pad is provided on the workbench, the pad block is provided in the middle of the pad, the pad block and the pad are an integrated structure, and the first supporting oil cylinder and the second supporting oil cylinder are provided on the pad.

3. The automatic clamping device for machine tool workpieces according to claim 2, characterized in that: The first supporting oil cylinder includes a first oil chamber provided on the backing plate, a first oil seal cooperating with the first oil chamber, and a first piston rod provided in the first oil chamber; the second supporting oil cylinder includes a second oil chamber provided on the backing plate, a second oil seal cooperating with the second oil chamber, and a second piston rod provided in the second oil chamber.

4. The automatic clamping device for machine tool workpieces according to claim 1, characterized in that: The distance between the two first supporting cylinders is greater than the distance between the two second supporting cylinders.

5. The automatic clamping device for machine tool workpieces according to claim 1, characterized in that: The maximum stroke of the first supporting oil cylinder and the second supporting oil cylinder is at the same height as the cushion block.

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