Machining Line C No. 2 inner wire overhaul and renovation invite tenders file


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Our company's C-line No. 2 double-head thread CNC machining machine has been used for many years. When this machine tool processes graphite electrodes, due to serious wear and tear between the moving parts, the verticality and coaxiality of the processed electrodes are seriously out of tolerance. Make an overhaul. At the same time, in order to reduce the failure rate of the machine tool in the future and improve the machining accuracy of the electrode end face, it is planned to modify the machine tool. In line with the principles of fairness, impartiality, voluntariness, and honesty, conduct public bidding for it, and select the best maintenance and reconstruction unit. The relevant matters are hereby announced as follows: 1. Requirements for overhaul and modification: (1) The main items of overhaul are as follows: 1. Grinding of bed and guide rail;

Our company's C line No. 2 double-ended thread CNC machining machine tool, has been used for many years, the machine tool to the graphite electrode processing, due to the serious wear between the moving parts, resulting in the processed electrode verticality, coaxiality is seriously out of tolerance, need to be overhauled. At the same time, in order to reduce the failure rate of the machine tool in the future and improve the machining accuracy of the electric terminal surface, it is planned to transform the machine tool. In accordance with the principles of fairness, justice, voluntariness and good faith, open bidding will be carried out and maintenance and transformation units will be selected on the basis of merit. The relevant matters are hereby announced as follows:


1. Requirements for major modifications:

(1) The main items of the overhaul are as follows:

1. Bed and guide rail grinding;

2. Replace the X-axis, Z-axis ball screws and supporting bearings on the left and right sides;

3. Replace the front and rear bearings of the right front box spindle;

4. Replace the lead screw and supporting bearings in the clamping device on the left and right sides;

5. CNC system update

6. All electrical control circuits are replaced (including electrical small wires in the electrical box)

(2) Details of the modification

1. The split conductive slip ring in the bedside box on both sides of the machine tool is transformed into an integrated conductive slip ring, thereby reducing the failure rate of the machine tool.

2. In order to improve the finish of the end face of the product, the original scraping plane is transformed into a milling plane.

(3) Main accuracy requirements after overhaul:

The fixture is coaxiality with the two bedside boxes≤ 0.02mm/m;

The verticality of the fixture and the two bedside boxes ≤ 0.02mm/m;

The ovality after two-hole processing - check the value ≤ 0.15mm with plug gauge and feeler gauge;

Other accuracy requirements are implemented with reference to relevant standards or specifications.

II. Deadline for major revisions:

After the contract is signed, the winning unit will disassemble the lathe back to the winning unit for major modification (all dismantling and transportation are completed by the winning unit itself,) After the major modification is completed, the winning unit will transport the lathe to our unit for installation and debugging until the acceptance is qualified, and the entire major modification period is 30 working days. $500 will be deducted from the contract amount for each day of delay.

III. Qualification Requirements for Bidding Units:

The bidding unit has the ability and qualification of machine tool manufacturing and overhaul, and has a good reputation.

4. Quotation method

This project adopts a one-time quotation, and the price is not adjusted.

5. Payment Methods

After the contract is signed, 30% of the total contract price is prepaid, the major modification is completed and the lathe is sent to our company, after the installation and commissioning are qualified, it is paid to 80%, and the performance bond (interest-free) is returned, and the performance deposit (interest-free) is paid after two months, and the remaining 90% is used as a warranty money, and the warranty period (one year) is paid after it expires.

6. Bidding matters

The bidders began to collect the tender documents at the equipment office on September 2017, 9, and the bidders submitted the bids before 5 a.m. on September 2017, 9.

The bidding unit shall pay the document and information fee of 100 yuan and (bid deposit of 10000,<> yuan) at the company's accounting office before receiving (submitting) the tender document, the document and information fee will not be refunded after the opening of the bid, the bidding deposit will be refunded without interest if the winning unit does not win the bid after the bid is opened, and the winning unit will be converted into a performance bond. (Collect and submit the tender documents with the receipt of the Financial Planning Office)

7. Evaluation and determination of bids

The evaluation and determination of bids shall be conducted by the bidding unit in conjunction with all relevant departments, and the bidding unit shall not be obliged to explain to the unsuccessful unit the reasons for not winning the bid.

Contact: Wang Xingshan Tel: 85559291 13921615786

Bidding unit: Nantong Yangtze Carbon Co., Ltd

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