Method for removing tailings of pipe cutting machine

Abstract

The invention discloses a method for removing tailings of a pipe cutting machine, and belongs to the technical field of numerical control pipe cutting machine production. According to the method, the tailing length is set to be the length of a finished product blank corresponding to current work of a machine tool, so that the tailing is changed into the finished product blank. According to the method for removing the tailings of the pipe cutting machine, on the basis that random head materials cannot be changed, the yield is improved by removing the tailings. The method meets the product requirements.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of numerical control pipe cutting machine production, and particularly relates to a method for removing tail material of a pipe cutting machine. BACKGROUND

[0002] In the seamless pipe working area, the production process of the finished coupling, the yield of the coupling pipe cutting machine accounts for a large proportion in the production cost of the coupling line. The present coupling pipe cutting machine is the Reika pipe cutting machine introduced from Germany, which has a high degree of automation. Due to the design and process limitations, the Reika pipe cutting machine has the waste of the head material and the tail material of the cut pipe. The loss of the head material and the tail material has been the main problem restricting the yield of the coupling pipe cutting machine. In order to realize cost reduction and benefit increase, and make the enterprise survive in the competition, the technical personnel have been seeking a method for removing the waste of the head material and the tail material.

[0003] 1. Process introduction of the coupling pipe cutting machine:

[0004] The steel pipe is cut by a rotating hard alloy cutter. The steel pipe is clamped and fixed in the cutting head by a three-jaw clamping device. The Reika pipe cutting machine realizes the fixed-length measurement of the pipe through a length measurement system and a servo motor. Before the newly loaded pipe starts to be cut, the CNC system obtains the total length of the raw pipe through the length measurement system. Since the Reika pipe cutting machine adopts front clamping for unloading, the tail material is designed to have a fixed length of 160 mm. The CNC calculation system subtracts the fixed length of 160 mm of the tail material from the total length, and then automatically calculates the number and the length of the corresponding standard and type coupling finished product blanks that can be cut out from the total length. The pipe head of the remaining less than one coupling finished product blank is the coupling head material. Because the total length of the incoming material is not fixed, the coupling head material is a random value. For example, the degree of the ∮153.7 round thread standard coupling finished product blank is 0.21 m, the total length of the raw pipe is 11.685 m, the total length of the raw pipe is 11.685 m minus the fixed length of the tail material 0.16 m = 11.525 m;

[0005] 11.525 m / 0.21 = 54.88;

[0006] That is, the number of the coupling finished product blanks is 54, and the length is 0.21 x 54 = 11.34 m;

[0007] From which the length of the head material is calculated as 11.525 m-11.34 m = 0.185 m;

[0008] That is, the head material of the raw blank pipe is 0.185 m, and the fixed tail material is 0.16 m;

[0009] Therefore, the total length of the wasted head and tail material is 0.185 m+0.16 m = 0.345 m>0.21 m;

[0010] That is, the total length of the wasted head and tail is much greater than the length of the standard coupling product blank.

[0011] 2. Basic introduction of coupling pipe cutting machine

[0012] Measuring device: accurate measurement is completed by an encoder and a CNC-shaft, which controls the position of the end cutting and the fixed-length cutting of the steel pipe in the pipe cutting machine and pushes out the head.

[0013] A front chuck: used for auxiliary clamping and axial unloading after cutting. The clamping jaw is suitable for clamping oil jacket pipes with diameters of 73mm and 269.9mm. The front chuck has two functions: one is to unload the cut coupling when the rear CNC feeding system completes positioning; the other is to position and feed the steel pipe when the rear CNC feeding system is ready to feed the new pipe.

[0014] Due to the defects in the initial design of the Reika pipe cutting machine, the Reika pipe cutting machine has the problem of waste of the head and tail of the cut pipe, which greatly restricts the improvement of the yield of the pipe cutting machine. The length of the tail is a fixed value of 160mm, and the length of the head is a random variable. The unloading of the head and tail is automatically completed by the front card to the left waste hopper, and generally does not require the handling of the operator. After the advanced operation method of the tail removal process optimization of the Reika coupling pipe cutting machine is adopted, the length of the tail is the length of the current working specification and the coupling product blank of the coupling product, that is, the tail becomes a finished coupling blank, which reduces the waste, and the length of the head is still a random variable determined by the total length of the pipe blank, which is less than the length of the coupling product blank of the specification, and this head is definitely a waste head. The removal of the tail and head, i.e. turning waste into treasure, improves the yield of the coupling pipe cutting machine by more than one percent. After this method is adopted, the unloading of the head is still automatically completed by the front card to the left waste hopper, and the tail is automatically unloaded to the scrap conveyor by the front chuck device. The minimum clamping length is 170mm, so when the length of the tail is set to be greater than 170mm, the front card needs to be assisted by the pipe cutting operator to complete the unloading of the tail, and this action only takes a few seconds of the pipe cutting operator's time to process, and the tail is removed and becomes a finished coupling blank, which has a great cumulative significance. SUMMARY

[0015] The purpose of the present application is to provide a method for removing the tail of a pipe cutting machine, which can improve the yield by removing the tail without changing the random head.

[0016] To solve the above technical problems, the present application adopts the following technical scheme:

[0017] The tail removal method of the pipe cutting machine sets the tail length as the length of the finished product blank corresponding to the current work of the machine tool, that is, the tail becomes a finished product blank.

[0018] 2. The tail removal method of the pipe cutting machine according to claim 1, characterized in that the pipe cutting is realized by using a Reika coupling pipe cutting machine.

[0019] 3. The tail removal method of the pipe cutting machine according to claim 2, characterized in that the Reika coupling pipe cutting machine machining program is processed by subprogram calling parameters, and the optimization of the tail length is realized by adjusting the parameters.

[0020] Further, the key parameter of the front clamp minimum length is adjusted from the original value to the length of the finished product blank.

[0021] Further, the method improves the pipe cutting machine yield from the original 93.5% to 94.8%.

[0022] Further, the method makes the tail waste become valuable finished product coupling blank.

[0023] Further, specifically: for the ∮153.7 round thread standard coupling finished product blank length of 0.21m, the min.tube length in the chuck-front clamp minimum length is adjusted from the original value of 160mm to 210mm, and the length of the tail cut out is 0.21m, that is, the length of a standard coupling finished product blank.

[0024] Compared with the prior art, the beneficial technical effects of the present application are:

[0025] In order to solve the defects of the initial design of the Reika pipe cutting machine, the Reika pipe cutting machine has the waste of the head and tail of the cut pipe. Before the implementation, the pipe cutting machine yield is 93.5%, and after the implementation, the pipe cutting machine yield is 94.8%. Before the implementation, the tail is abandoned as scrap steel, and after the implementation, the tail becomes valuable finished product coupling blank. After the implementation of the Reika coupling pipe cutting machine tail removal method, the current coupling pipe cutting machine yield is improved by 1.3%, 2655 finished product blank couplings are accumulated from January to August 2013, and the cost is saved by 164418 yuan, that is, the annual benefit is expected to be 164000 yuan.

[0026] With the fierce market competition, customers' requirements on products are also increasing year by year, and improving product quality and performance is the only way for us to create product brand and survive in the competition. The method of the present application adjusts the parameters of the coupling pipe cutting machine to form a method for removing the tail material of the coupling pipe cutting machine, that is, on the basis of being unable to change the random head material, the tail material is removed to realize the method for improving the yield. This method not only meets the product requirements, but also reduces the cost, plays the role of reducing cost and increasing benefit, and is widely used in the production of coupling pipe cutting. DETAILED DESCRIPTION

[0027] EMBODIMENT

[0028] In order to realize cost reduction and benefit increase, and improve the yield of Reika coupling pipe cutting machine, the technical personnel analyzes the factors affecting the yield, decides to start from the tail material of the coupling head which is the main factor affecting the yield of Reika coupling pipe cutting machine, because the head material is a random value, and the total length of the coupling raw material is also randomly changed, that is, the head material cannot be removed, so the focus is on the control of the tail material of the coupling. The initial design is designed by the machine tool expert outside, and the minimum clamping length is 170mm due to the design of the front chuck, that is, the distance of the front chuck device automatically discharging the head material to the scrap conveyor determines the minimum clamping length of 170mm, and the tail material is fixed at 160mm, so the technical personnel decides to start from this parameter value, and reduces the waste by changing the tail length to the length of the corresponding specification and coupling product blank. After determining the idea, the technical personnel first starts from the electrical program, and decides to find a breakthrough from the machining program in the case of no result. Because the machining program of Reika coupling pipe cutting machine is a parameter calling subprogram for machining, the best way to realize optimization is to adjust the parameters. After understanding the functions and effects of all parameters, the technical personnel locks the key parameter of'min.tubelength in the chuck' (minimum length of the front card), and adjusts the original value of 160mm. For example: the length of the standard coupling product blank of ∮153.7 round thread is 0.21m, so the technical personnel adjusts the'min.tubelength in the chuck' (minimum length of the front card) from the original value of 160mm to 210mm. Through practice, the length of the tail material cut out is 0.21m, that is, the length of a standard coupling product blank, which proves that this method is effective.

[0029] Table 1 production introduction before and after the invention:

[0030]

[0031] Table 2 effect introduction before and after the invention:

[0032]

[0033] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A method for tail removal of a pipe cutting machine, characterized in that, The tail length is set as the length of the finished product blank corresponding to the current work of the machine tool, that is, the tail becomes a finished product blank.

2. The method for tail removal of a pipe cutting machine according to claim 1, characterized in that, A Reika coupling pipe cutting machine is used to cut the pipe.

3. The method of tail removal from a pipe cutting machine according to claim 2, wherein, The Reika coupling pipe cutting machine machining program is processed by subprogram calling parameters, and the optimization of the tail length is realized by adjusting the parameters.

4. The method of tail removal from a pipe cutting machine according to claim 1, wherein, The parameter of the minimum length of the front chuck is adjusted from the original value to the length of the finished product blank.

5. The method of tail removal from a pipe cutting machine according to claim 1, wherein, The method improves the cutting machine yield from 93.5% to 94.8%.

6. The method of tail removal from a pipe cutting machine according to claim 1, wherein, The method makes the tail waste valuable, and the finished product coupling blank.

7. The method of tail removal from a pipe cutting machine according to claim 3, wherein, Specifically, for the ∮153.7 round thread standard coupling finished product blank, the length is 0.21 m, the minimum length of the front chuck is adjusted from the original value of 160 mm to 210 mm, and the length of the tail cut out is 0.21 m, that is, the length of a standard coupling finished product blank.

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