An automatic reset and self-aligning set of cylinder clamps

Abstract

The utility model discloses an automatic reset and self-aligning sleeve oil cylinder clamp, wherein the basic chuck comprises a coaxial truncated cone part, a positioning part one and a connecting part one; the truncated cone part is connected to the chuck of a machine tool; the positioning part one comprises key holes evenly distributed in radial direction, and the inner side of the connecting part one is provided with threads; the front self-aligning cone disk comprises a coaxial positioning part two, a connecting part two and a conical part one; the positioning part two is also provided with a key hole; the outer side of the connecting part two is provided with threads; the connecting part one and the connecting part two are connected by threads, and the key is inserted into the key holes of the positioning part one and the positioning part two; the rear self-aligning cone disk comprises a coaxial base and a conical part two, and the base abuts against the tail plate of the machine tool; the workpiece is clamped between the conical part one and the conical part two; the utility model has the advantages that the clamp is used in conjunction with an elastic ejector rod to adjust the outer circle of the oil cylinder blank to make it quickly concentric with the main shaft of the lathe, that is, to quickly align, save processing time and ensure processing safety at the same time.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a clamp. Background Art

[0002] The manufacturing of various oil cylinders for coal mine excavators and various hydraulic jack oil cylinders requires many machining processes. Positioning and clamping are required in each machining process. The role of the fixture is very important in this process. It is an important factor in ensuring processing quality and efficiency.

[0003] The cone angle of the cylinder is the positioning reference used by the deep hole boring machine to process the inner hole of the cylinder during the manufacturing process of the cylinder. It is also the process reference and is processed on the lathe. The cone angle of the cylinder is at the outer circle of the two end faces of the cylinder. The existing technology requires secondary clamping, which can easily cause the machining of the cone angles at both ends of the cylinder to be out of tolerance; in addition, the existing fixture does not have an automatic self-aligning function, and the axes of the two cone angles after processing often do not coincide with the axis of the cylinder, causing eccentricity. Utility Model Content

[0004] In order to solve the above technical problems, the purpose of the utility model is to provide an automatic reset self-aligning set cylinder clamp, characterized in that it includes a clamp and an elastic push rod; the clamp includes a basic chuck, a front self-aligning cone disk, and a rear self-aligning cone disk, the basic chuck includes a coaxial truncated cone part, a positioning part one and a connecting part one; the truncated cone part is connected to the chuck of the machine tool; the positioning part one includes key holes evenly distributed in the radial direction, and the inner side of the connecting part one is provided with a thread; the front self-aligning cone disk includes a coaxial positioning part two, a connecting part two and a conical part one; the positioning part two is also provided with a key hole; the outer side of the connecting part two is provided with a thread; the connecting part one and the connecting part two are connected by threads, and the key is inserted into the key holes of the positioning part one and the positioning part two; the rear self-aligning cone disk includes a coaxial base and a conical part two, and the base abuts against the tail disk of the machine tool; the workpiece is clamped between the conical part one and the conical part two; the elastic push rod includes a rod body and a grinding wheel arranged at the front end of the rod body and axially connected to the rod body.

[0005] In order to increase elasticity and prevent hard collision with the workpiece, the rod body is provided with a groove.

[0006] In order to detect the amount of runout, a dial indicator is arranged on the rod body.

[0007] The rod body is connected to the middle slide plate of the machine tool.

[0008] The utility model has the advantages that the clamp is used in conjunction with the elastic ejector rod to adjust the outer circle of the cylinder blank to make it quickly concentric with the main shaft of the lathe, that is, to quickly align, save processing time and ensure processing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 is a schematic diagram of the structure of the basic chuck;

[0011] Figure 3 It is a structural schematic diagram of the front self-aligning cone disc;

[0012] Figure 4 It is a schematic diagram of the structure of the elastic push rod. DETAILED DESCRIPTION

[0013] The present invention is described in detail below in conjunction with the accompanying drawings. As shown in the figure, the present invention includes a basic chuck 1, a front self-aligning cone disk 2, and a rear self-aligning cone disk 3. The basic chuck includes a coaxial truncated cone portion 101, a positioning portion 102, and a connecting portion 104; the truncated cone portion is connected to the chuck 4 of the machine tool; the positioning portion 102 includes radially uniformly distributed key holes 103, and a thread 105 is arranged on the inner side of the connecting portion 104; the front self-aligning cone disk includes a coaxial and integrally fixed positioning portion 201, a connecting portion 202, and a conical portion 203, and the fixing method can be welding or A piece of raw material is processed into an integral body; the positioning part 201 is also provided with a key hole; the outer side of the connecting part 202 is provided with a threaded part 204; the connecting part 104 and the connecting part 202 are connected by threads, and the key 8 is inserted into the key holes of the positioning part 102 and the positioning part 201; the rear self-aligning cone disk includes a base 31 and a cone part 2 32 which are coaxial and fixed as one, and the base 31 abuts against the tail disk 5 of the machine tool; the workpiece 7 is clamped between the cone part 1 203 and the cone part 2 32; the elastic push rod 6 includes a rod body 61 and a grinding wheel 62 which is arranged at the front end of the rod body and is axially connected to the rod body through an axis 64.

[0014] In order to increase elasticity and prevent hard collision with the workpiece, the rod body is provided with a slot 63.

[0015] In order to detect the amount of runout, a dial indicator is arranged on the rod body.

[0016] The rod body is connected to the middle slide plate of the machine tool.

[0017] The use method of the utility model is as follows: the front self-aligning cone disk is installed in the base disk, the workpiece is clamped between the front self-aligning cone disk and the rear self-aligning cone disk, the axial force is applied by the tailstock sleeve for pre-tightening, and then the lathe rotates at a medium or low speed, the middle slide of the machine tool is connected to the elastic push rod, the middle slide is moved to make the elastic push rod slowly contact the outer circle of the cylinder, and the radial force f is gradually applied, and it is judged according to the run-out value of the dial indicator until the outer circle at this place is in uniform contact with the grinding column of the elastic push rod, and then the elastic push rod is withdrawn and moved to the outer circle on the other side of the cylinder, and the cylinder is aligned as a whole in the same way. After alignment, the tailstock handwheel of the lathe is used to drive the tailstock sleeve to tighten the self-aligning cone disk and the cylinder, and then the taper angles on both sides of the cylinder are processed, and the position accuracy of the taper angles of the two cylinders is guaranteed by one clamping and turning.

[0018] After the cylinder is aligned, use the lathe tailstock sleeve to tighten it, and use friction to make the machine tool drive the cylinder workpiece to rotate so that the cylinder taper angle can be processed. The machining allowance of the cylinder taper angle is very small and the cutting amount is also very small. The cutting force generated is also very small, and the position of the cylinder in the fixture will not change.

Claims

1. An automatic reset self-aligning set cylinder clamp, characterized by: It comprises a fixture and an elastic push rod; the fixture comprises a basic chuck, a front self-aligning cone disk, and a rear self-aligning cone disk, the basic chuck comprises a coaxial frustum part, a positioning part 1 and a connecting part 1; the frustum part is connected to the chuck of a machine tool; the positioning part 1 comprises key holes evenly distributed in radial direction, and a thread is arranged on the inner side of the connecting part 1; the front self-aligning cone disk comprises a coaxial positioning part 2, a connecting part 2 and a conical part 1; the positioning part 2 is also provided with a key hole; a thread is arranged on the outer side of the connecting part 2; the connecting part 1 and the connecting part 2 are connected by threads, and the key is inserted into the key holes of the positioning part 1 and the positioning part 2; the rear self-aligning cone disk comprises a coaxial base and a conical part 2, and the base abuts against the tail disk of the machine tool; the workpiece is clamped between the conical part 1 and the conical part 2; the elastic push rod comprises a rod body and a grinding wheel arranged at the front end of the rod body and axially connected to the rod body.

2. The automatic reset and self-aligning sleeve cylinder fixture according to claim 1 is characterized in that: The rod body is provided with a slot.

3. The automatic reset and self-aligning sleeve cylinder fixture according to claim 1 is characterized in that: A dial indicator is arranged on the rod body.

4. The automatic reset and self-aligning sleeve cylinder fixture according to claim 1 is characterized in that: The rod body is connected to the middle slide plate of the machine tool.

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