A press machine and a detection method thereof

Abstract

The application discloses a buckling press, which comprises a frame, a base is arranged on the frame, hydraulic cylinders are arranged on the base, and a buckling claw is fixed on each hydraulic cylinder, characterized in that the hydraulic cylinder comprises a cylinder body and a first piston rod and a second piston rod, one end of the first piston rod is connected with a first piston, the other end of the first piston rod extends out of the head of the cylinder body and is connected with the buckling claw, one end of the second piston rod is connected with a second piston, the other end of the second piston rod extends out of the tail of the cylinder body, a high-pressure oil hole is further arranged in the second piston rod, the outlet of the high-pressure oil hole is located on the end face of the opposite end of the second piston relative to the first piston, the first piston and the second piston are slidably connected in the cylinder body, and the rear end of the cylinder body is provided with a low-pressure oil first inlet, and the first inlet is located at the rear of the second piston.

Description

TECHNICAL FIELD

[0001] The present application relates to a buckling machine. BACKGROUND

[0002] The sleeve of a shock absorber is provided with a clasp, which needs to be pressed against the sleeve by several buckling claws, and then moves forward to uniformly extrude the clasp on the sleeve, and the clasp is deformed to tightly clamp the outer wall of the sleeve.

[0003] In order to ensure the tight connection between the clasp and the sleeve, it is necessary to ensure the consistent deformation of the clasp in all directions, which requires the synchronous movement of the buckling claws. At present, one hydraulic cylinder is generally used to control one buckling claw. Since it is difficult to synchronize multiple hydraulic cylinders, the situation that some parts of the clasp are first contacted by some buckling claws while other buckling claws are not in place often occurs. At this time, if the movement continues, the buckling claws that first contact the clasp will start to extrude at these positions, which is easy to cause inconsistent deformation of the clasp, resulting in defective products. Therefore, it is necessary to improve.

[0004] In addition, the previous inspection of whether the clasp is buckled in place is relied on manual visual observation, which is not only time-consuming and laborious, but also easy to misjudge. Therefore, it is necessary to improve. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a buckling machine, which can avoid the problem that some buckling claws directly extrude the clasp before other buckling claws.

[0006] Another object of the present application is to provide a buckling detection method, which can know whether the product is qualified without using the naked eye.

[0007] The technical scheme adopted by the present application to solve its technical problems is: a buckling machine, comprising a rack, a base is arranged on the rack, a hydraulic cylinder is arranged on the base, a buckling claw is fixed on each hydraulic cylinder, the hydraulic cylinder comprises a cylinder body and a first piston rod and a second piston rod, one end of the first piston rod is connected with a first piston, the other end of the first piston rod extends out of the head of the cylinder body and is connected with the buckling claw, one end of the second piston rod is connected with a second piston, the other end of the second piston rod extends out of the tail of the cylinder body, a high-pressure oil hole is further arranged in the second piston rod, the outlet of the high-pressure oil hole is located on the end face of the second piston opposite to the first piston, the first piston and the second piston are slidably connected in the cylinder body, the rear end of the cylinder body has a low-pressure oil first inlet, the first inlet is located at the rear of the second piston, and the front end of the cylinder body has a low-pressure oil second inlet, the second inlet is located at the front end of the first piston. In use, low-pressure oil is first injected from the low-pressure oil first inlet to push the second piston and the first piston to advance together until the buckling claw contacts the surface of the clasp. Then high-pressure oil is added from the high-pressure oil hole, and under the push of the high-pressure oil, the first piston continues to push the buckling claw to advance under the action of the high-pressure oil, and the buckling claw is embedded into the surface of the clasp, so that the clasp is buckled tightly. The buckling machine with the above structure adopts a hydraulic cylinder with two strokes, the first stroke allows the buckling claw to contact the clasp, and after all the buckling claws complete the first stroke, the second stroke is performed to press the surface of the buckling claw, so that the clasp is connected to the sleeve. In this way, the inconsistent deformation of the clasp at different positions caused by the unsynchronized movement of the hydraulic cylinders can be avoided with a high probability, and thus the defective rate can be greatly reduced.

[0008] In the above technical scheme, preferably, an adjusting nut is arranged on the end of the second piston rod extending out of the cylinder body. By rotating the adjusting nut to adjust the position, the farthest position that the first piston can reach under the push of the second piston can be adjusted. Generally, when the adjusting nut contacts the cylinder body, the buckling claw just contacts the clasp.

[0009] In the above technical scheme, preferably, a displacement sensor is connected to the first piston rod.

[0010] In the above technical scheme, preferably, a guide disc is arranged on the base, a guide groove is arranged on the guide disc, and the buckling claw is slidably connected in the guide groove. The guide disc is used to limit the advancing direction of the buckling claw.

[0011] In the above technical scheme, preferably, the top of the guide groove has a pressing plate, and the pressing plate blocks the top of the buckling claw. The pressing plate is used to block the top of the buckling claw to prevent the buckling claw from sliding out of the sliding groove.

[0012] In the above technical solution, preferably, the lower end face of one side of the pressing claw has a first step, and the upper end face of the other side of the pressing claw has a second step, and the first step and the second step are mutually buckled.

[0013] A detection method of a pressing machine, a coordinate system is established in software, pressure is taken as a longitudinal coordinate, stroke is taken as a transverse coordinate, and lower limit curve A and upper limit curve B of the operation of pressure and stroke are set on the coordinate system of the software; 2) the pressure data of each hydraulic cylinder and the stroke data of each pressing claw are collected by a sensor and transmitted to the software in real time, and are projected on the coordinate system in the form of points, then a connection line is established according to the hydraulic cylinder corresponding to the points and the pressing claw connected thereto, forming curve C. 3) the software judges whether curve C exceeds the range of curve A and curve B, if curve C exceeds the range, it is judged that the product is unqualified, otherwise it is judged that the product is qualified.

[0014] The pressing machine has the following beneficial effects: the hydraulic cylinder used in the pressing machine has two strokes, the first stroke allows the pressing claw to contact the clasp, and the second stroke is performed after all the pressing claws complete the first stroke, so that the surface of the pressing claw is extruded to connect the clasp to the sleeve, thereby greatly reducing the non-uniform extrusion deformation of the clasp at different positions caused by the unsynchronized hydraulic cylinders, and greatly reducing the rate of defective products. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a top view of the present application.

[0016] Figure 2 is Figure 1 is a schematic view along A-A.

[0017] Figure 3 is Figure 2 is a partial enlarged view of

[0018] Figure 4 is a schematic view of the hydraulic cylinder.

[0019] Figure 5 is a schematic view of the pressing claw. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in combination with the drawings and specific embodiments:

[0021] Referring to Figures 1 to 5 , a pressing machine, comprising a rack 1, a base 2 is arranged on the rack 1, eight hydraulic cylinders 3 are arranged on the base 2, the eight hydraulic cylinders are uniformly distributed around an axis, and the axis is the axis of the clasp to be processed. Each hydraulic cylinder 3 is fixed with a pressing claw 4.

[0022] The hydraulic cylinder 3 comprises a cylinder body 33 and a first piston rod 31 and a second piston rod 32.

[0023] The first piston rod 31 is connected with a first piston 311 at one end, and the other end of the first piston rod 31 extends out of the head of the cylinder body 33 and is connected with the clamping claw 4. A displacement sensor 5 is connected to the first piston rod 31. The displacement sensor is used to detect the travel distance of the clamping claw.

[0024] The second piston rod 32 is connected with a second piston 321 at one end, and the other end of the second piston rod 32 extends out of the tail of the cylinder body 33. A high-pressure oil hole 322 is further provided in the second piston rod 32, and the outlet of the high-pressure oil hole 322 is located on the end face of the second piston 321 opposite to the first piston 311. The first piston 311 and the second piston 321 are slidingly connected in the cylinder body 33. An adjusting nut 34 is provided on the end of the second piston rod 32 extending out of the cylinder body 33. By rotating the adjusting nut to adjust the position, the most forward position that the second piston can push the first piston to reach can be adjusted. Generally, when the adjusting nut is in contact with the cylinder body, the clamping claw is just in contact with the clamping ring.

[0025] The rear end of the cylinder body 33 has a low-pressure oil first inlet 331, and the first inlet 331 is located at the rear of the second piston 321. The front end of the cylinder body 33 has a low-pressure oil second inlet 332, and the second inlet 332 is located at the front end of the first piston 311.

[0026] A guide disc 21 is provided on the base 2, and a guide groove 22 is provided on the guide disc 21. The clamping claw 4 is slidingly connected in the guide groove 22. The guide disc is used to define the advancing direction of the clamping claw. The top of the guide groove 22 has a pressing plate 23, which blocks the top of the clamping claw 4. The pressing plate is used to block the top of the clamping claw to prevent the clamping claw from sliding out of the sliding groove.

[0027] The lower end face of one side of the clamping claw 4 has a first step 41, and the upper end face of the other side of the clamping claw 4 has a second step 42. The first step 41 and the second step 42 of adjacent two clamping claws 4 are mutually clamped.

[0028] In use, first fill low pressure oil from the low pressure oil first inlet, push the second piston and the first piston together to the front end, until the buckle claw and the surface of the buckle ring contact. Then add high pressure oil from the high pressure oil port, high pressure oil into the first piston and the second piston between the high pressure oil, under the action of high pressure oil, the first piston continues to push the buckle claw forward under the action of high pressure oil, embedded in the surface of the buckle ring, so that the buckle ring is buckled. The buckle machine of this structure, the hydraulic cylinder used has two strokes, the first stroke first lets the buckle claw contact with the buckle ring, we can wait for all the buckle claw to complete the first stroke, then carry out the second stroke, extrude the surface of the buckle claw, so that the buckle ring is connected on the sleeve. This can greatly avoid the inconsistent extrusion deformation of the buckle ring at each position caused by the unsynchronized hydraulic cylinders, so as to greatly reduce the scrap rate.

[0029] A detection method of a buckle machine, comprising the following steps:

[0030] 1) A coordinate system is established in the software, taking pressure as the longitudinal coordinate and stroke as the horizontal coordinate, and setting the lower limit curve A and the upper limit curve B of pressure and stroke in the coordinate system of the software;

[0031] 2) Collect the pressure data of each hydraulic cylinder and the stroke data of each buckle claw with the sensor, and transmit them to the software in real time, and project them on the coordinate system in the form of points, then establish a connection according to the corresponding hydraulic cylinder and the buckle claw connected thereto, and form a curve C.

[0032] 3) The software judges whether the curve C exceeds the range of curve A and curve B, if the curve C exceeds the range, the product is judged unqualified, otherwise the product is judged qualified.

[0033] The hydraulic oil pressure in each hydraulic cylinder and the stroke of the buckle claw are used to judge whether the product is qualified, without workers relying on naked eyes to observe one by one, which greatly improves the detection efficiency, and also avoids misjudgment.

Claims

1. A detection method of a buckling machine, the buckling machine comprising a frame, a base provided on the frame, a hydraulic cylinder provided on the base, a buckling claw fixed on each of the hydraulic cylinders, the hydraulic cylinder comprising a cylinder body and a first piston rod and a second piston rod, one end of the first piston rod being connected with a first piston, the other end of the first piston rod extending out of a head of the cylinder body and being connected with the buckling claw, one end of the second piston rod being connected with a second piston, the other end of the second piston rod extending out of a tail of the cylinder body, a high-pressure oil hole being further provided in the second piston rod, an outlet of the high-pressure oil hole being located on an end face of the second piston opposite to the first piston, the first piston and the second piston being slidably connected in the cylinder body, a rear end of the cylinder body having a low-pressure oil first inlet, the low-pressure oil first inlet being located at a rear part of the second piston, a front end of the cylinder body having a low-pressure oil second inlet, the low-pressure oil second inlet being located at a front end of the first piston, in use, low-pressure oil is first filled from the low-pressure oil first inlet to push the second piston and the first piston to move forward together until the buckling claw contacts a surface of a clasp, then high-pressure oil is added from the high-pressure oil hole, the high-pressure oil is injected between the first piston and the second piston, the first piston continues to push the buckling claw to move forward under the action of the high-pressure oil, and the buckling claw is embedded into the surface of the clasp to make the clasp be buckled, characterized in that: 1) a coordinate system is established in software, pressure is taken as a longitudinal coordinate, stroke is taken as a transverse coordinate, and a lower limit curve A and an upper limit curve B of pressure and stroke are set on the coordinate system of the software; 2) pressure data of each of the hydraulic cylinders and stroke data of each of the buckling claws are collected by sensors and transmitted to the software in real time, and are projected on the coordinate system in the form of points, then a connection line is established according to the hydraulic cylinders and the buckling claws connected with the hydraulic cylinders corresponding to the points to form a curve C; and 3) the software judges whether the curve C exceeds the range of the curve A and the curve B, if the curve C exceeds the range, it is judged that the product is unqualified, otherwise it is judged that the product is qualified.

2. The detection method of the buckling machine according to claim 1, characterized in that: an adjusting nut is provided on one end of the second piston rod extending out of the cylinder body.

3. The detection method of the buckling machine according to claim 1, characterized in that: a displacement sensor is connected to the first piston rod.

4. The detection method of the buckling machine according to claim 1, characterized in that: a guide disc is provided on the base, a guide groove is provided on the guide disc, and the buckling claw is slidably connected in the guide groove.

5. The detection method of the buckling machine according to claim 4, characterized in that: the top of the guide groove has a pressing plate, and the pressing plate blocks the top of the buckling claw.

6. The detection method of the buckling machine according to claim 1, characterized in that: the lower end face of one side of the buckling claw has a first step, the upper end face of the other side of the buckling claw has a second step, and the first step and the second step are buckled with each other. ​ ​ ​ ​ ​ ​ ​ ​

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