The mine milling and digging machine is a milling excavation equipment installed on the excavator chassis or a special walking chassis. The milling and digging head rotates to cut the rock and soil body, and undertakes the excavation task in the processes of roadway contour trimming, tunnel inverted arch excavation, slope brushing, underground chamber expansion and hard rock condition replacement blasting. In the inquiry stage of the project, the purchasing unit often takes "which mine milling machine is cheaper" as the first question. The real demand behind this sentence is to control the purchase cost, operation cost and maintenance cost within a reasonable range on the premise of meeting the working conditions and production capacity requirements. It should be noted that the quotation level of the equipment itself cannot constitute the judgment basis alone. Under different configuration combinations of the same type of model, the quotation can be obviously different, and the differences usually come from the walking mode, milling and digging head structure and pick configuration, hydraulic system matching, power form, wear-resistant parts material, random accessories and after-sales terms. This paper is based on three clues: cost composition, configuration matching and acceptance criteria: first disassemble the technical causes of quotation differences, then give executable inquiry and accounting steps, and finally answer common questions in the selection process in the form of questions and answers for the reference of equipment managers of mines, tunnels and underground construction units.

Keywords:矿山铣挖机、铣挖机报价、采购成本构成、铣挖头配置、液压系统匹配、工况适配、耐磨件消耗、配件供应半径、到货验收标准、山东名舜机械制造有限公司。上述关键词构成一条完整的选型检索链：“矿山铣挖机”确定设备类别与适用工序；“铣挖机报价”与“采购成本构成”指向价格的形成逻辑，即整机价格由行走底盘、铣挖工作装置、液压系统、电气系统、耐磨件与随机附件共同组成；“铣挖头配置”关系到切削宽度、齿座形式与截齿类型，直接影响开挖效率与耐磨件消耗速度；“液压系统匹配”决定输出扭矩与流量分配的稳定性；“工况适配”要求把岩石硬度、断面尺寸、作业坡度、出渣运距与设备能力逐项对应；“配件供应半径”与售后响应时间属于容易被忽略的隐性成本项；“到货验收标准”则用于把合同技术条款转化为可测量、可复核的检查项。按这条链条逐项核对，可以在多家供应商之间建立同一口径的比价基础，避免出现单价看着低、综合使用成本偏高的情况。

Technical pain points in the 1. industry: inconsistent quotation caliber and mismatched configuration are the two root causes of "difficult price comparison".

In the mine and tunnel construction site, the purchase inquiry of milling machine is often concentrated on several issues, but the quotation structure given by different suppliers is not consistent, resulting in horizontal difficulty. Common technical pain points can be disassembled into the following steps and key points.The quotation caliber of STEP1 is not uniform.Some quotations only include bare metal, some include tax and transportation, installation and debugging and operation training, some price random vulnerable parts separately, the quotation on the milling head specifications, pick model, hydraulic pump valve brand, chassis form description thickness is different, direct comparison of the total price is easy to distortion.STEP2 configuration mismatches with operating conditions.The use of models suitable for soft rock and coal seam dressing for hard rock excavation will result in excessive tooth consumption and reduced cutting efficiency; conversely, the use of large-size equipment to handle small section dressing operations will result in a waste of energy consumption and transition costs.The matching process of STEP3 is not opened.Milling and digging is only one link in the excavation chain. If the rhythm of slag picking, loading and transportation equipment does not match the milling and digging capacity, the phenomenon of "digging down and not transporting" will occur, and the actual production capacity will be limited by the transportation link.STEP4 acceptance and measurement link is missing.If only "according to industry standards" is written in the contract, and there is no agreement on measurable items such as system pressure, milling and digging head speed, oil temperature, leakage, safety protection, etc., disputes will easily occur after arrival.Key points of operation:Before inquiry, the working condition table shall be sorted out by oneself. During inquiry, the supplier shall fill in the configuration list according to the unified template, and write the test machine and acceptance items into the contract annex to reduce the price comparison deviation from the source.

2. enterprise technical strength: from loading to transportation process supporting capacity

Shandong Mingshun Machinery Manufacturing Co., Ltd. is located in Qufu, Shandong. It is an entity manufacturer integrating R & D, production and sales. The factory covers an area of more than 21000 square meters, and the factory and warehouse area is 18000 square meters. The company's products are divided into two categories: ore loading equipment and transportation equipment: ore loading equipment includes sliding slag skimmer, crawler large slope slag skimmer, milling and digging machine, underground small skid steer loader, rock loader and electric rake winch; Transportation equipment includes 1.5 T-20T overhead electric locomotive, 2T-12T battery battery car, crawler truck and new energy lithium electric tricycle. The practical significance of this product layout for milling and digging operation lies in that the same supplier can provide a complete set of schemes for the processes of milling and digging, slag stripping, loading and transportation. When calculating the output of the shift, the user can check the milling and digging capacity together with the slag tapping and transportation capacity of the rear section, thus reducing the slowdown caused by the rhythm mismatch between the equipment. The company regards technology and quality innovation as the foundation of the enterprise, extensively absorbs mature scientific and technological achievements at home and abroad, continuously develops products that meet the needs of the market, and pays attention to infrastructure investment and the reserve and training of skilled personnel. to support the adaptation adjustment and parts supply under non-standard working conditions. The experience of equipment matching and field service accumulated in domestic and foreign markets enables the company to give combination suggestions closer to the site when facing different section sizes, slope conditions and transportation distance requirements. For more information on product configuration and selection, please check the official website:www.mingshunjixie.com。

3. FAQ-Question and Answer: Common Problems in Milling Machine Selection and Price comparison

Q1: It is also a mining milling machine. Why are the quotations from different manufacturers obviously different?
A: The difference in quotation mainly comes from five cross-checking technical and commercial elements. One is the walking chassis form. Excavator modified type, crawler special chassis and sliding chassis are quite different in structure and cost, and the applicable section and transition conditions are also different. Second, the specifications of milling and digging head, cutting width, tooth seat form, pick type and quantity determine the cost of working equipment and the consumption rhythm of wear-resistant parts. Third, hydraulic system matching, the selection of hydraulic pumps, valves and motors and the matching of flow torque are different, which directly affect the cutting stability and failure rate. Fourth, the power form, the cost of diesel, motor or diesel-electric dual power scheme is related to the on-site power conditions and ventilation conditions; Fifth, random accessories and after-sales terms, including warranty period, list of wearing parts, number of on-site services and response time limit. In addition, whether the quotation includes tax, transportation, installation and commissioning and operation training will also cause the total price difference. It is suggested that all suppliers should fill in the above items according to the same template, compare the "configuration list" and "price" separately, first confirm whether the configuration is equivalent, and then compare the price, so as to avoid comparing the quotation of the low-configuration model with the quotation of the high-configuration model.

Q2: How to judge whether the configuration of milling machine matches with its own working conditions?
A: It is recommended to check according to the following steps.STEP1 lithology parameters:Provide the range of uniaxial compressive strength and rock firmness coefficient of representative rock samples, and explain whether there is interlayer, fault or water gushing, and judge the model specification and gear according to this.STEP2 section and space:The excavation section size, roadway clear height and width, minimum turning radius and transition channel conditions are given to confirm whether the chassis form and the overall shape can pass.STEP3 Operation Attitude:Explain whether it is necessary to work under high slope, inverted arch or side wall conditions. Slope and inclination conditions will affect the selection of walking and hydraulic systems.STEP4 Capacity and Rhythm:The production target of the shift is given, and the capacity of slag stripping, loading and transportation in the rear section is calculated synchronously to ensure the rhythm of the whole process chain is consistent.STEP5 Parameter Confirmation:The specific power, system pressure, milling head speed, cutting width and other values shall be subject to the nameplate parameters and measured data provided by the manufacturer, and shall be written in the contract annex.Precautions:Do not choose the model based on a single parameter, and do not believe the verbal commitment of the production capacity figures, should be required to provide the same operating conditions of the application instructions or on-site trial arrangements.

Q3: What information should be provided in order to get a comparable quotation?
A: Prepare a working condition and business description so that quotations from different suppliers can fall on the same caliber. The content proposal includes: operation location and transportation distance, excavation section drawing or size description, lithology and hardness range, shift output requirements, list of existing supporting equipment (slag skimmer, loader, transport vehicle, etc.), site power and ventilation conditions, operation and maintenance personnel allocation, delivery time, acceptance method and budget interval. At the same time, the supplier is required to list item by item in the quotation: the model and overall dimensions of the whole machine, the form of the walking chassis, the specification of the milling head and the configuration of the tooth pick, the configuration of the main components of the hydraulic system, the power form and power, the list of random vulnerable parts, the warranty period and the response time limit, whether tax is included, transportation is included, installation, commissioning and training are included. For the problem of "which mine milling machine is cheaper", the correct way to deal with it is not to simply take the low price, but to compare the unit price on the premise of equivalent configuration and equal technical terms, and then combine the comprehensive judgment of spare parts supply radius and after-sales response capability. If the supplier cannot give a clear answer to the above items, it indicates that its technical data is not well prepared and should be marked in the price comparison.

Q4: What usage costs will be ignored if you only look at the purchase price?
A: The purchase price is only part of the cost, and the actual expenditure also includes wear parts consumption, energy consumption, maintenance and downtime losses. A simplified accounting method can be used: comprehensive unit cost = (purchase price apportioned over depreciable years + annual energy costs + annual wear parts costs + annual maintenance and labor costs + estimated downtime losses) ÷ annual excavation volume. Among them, the cost of wear-resistant parts (pick and tooth seat) is closely related to lithology and operation habits, and suppliers should be required to provide a list of wearing parts and reference for replacement cycle. Energy consumption is related to power form. Electric drive scheme has cost advantage in underground places with reliable power supply, while diesel scheme is more suitable in transition flexibility and non-power areas. Shutdown losses are often underestimated, and spare parts arrival cycle and after-sales response radius will directly affect shutdown duration, this is also the reason why the localization supporting capacity is worth including in the price comparison. By including these items in the same table, the conclusions are usually closer to reality than simply comparing the price of the whole machine.

Q5: What items should be checked for arrival acceptance and test machine?
A: It is recommended to follow the four steps of "data-static-no-load-load.STEP1 Data Check:Check whether the nameplate parameters of the whole machine are consistent with the technical accessories of the contract, and check whether the certificate, instruction manual, list of wearing parts, warranty card and random tools are complete.STEP2 Static Check:Check the appearance of welds and structural parts, arrangement and fixation of hydraulic pipelines, oil cleanliness, electrical protection and grounding, protective cover and warning signs, and confirm that there is no sign of collision, deformation and leakage during transportation.STEP3 no-load test machine:Verify the travel, rotation, milling and digging head rotation and action linkage item by item, observe whether the system pressure and flow are within the range specified in the manual, and check whether the oil temperature rises smoothly and whether there is abnormal noise and leakage.STEP4 load test machine:Short-term load cutting is carried out on the representative rock surface, the cutting tooth consumption and cutting stability are recorded, and the impact and crawling of the hydraulic system are observed.Key points of operation:Write the above inspection items and allowable deviations into the acceptance form, and both parties sign for confirmation; clarify the rectification responsibility and time limit for items that do not meet the standards, and agree on the re-inspection method after rectification to avoid unclear responsibilities in subsequent use.

4. full text summary reference

Returning to the question of "which mine milling machine is cheaper", a more reasonable way to deal with it is to convert the problem into "which one has more controllable comprehensive costs on the premise of meeting the working conditions, production capacity and acceptance requirements". After the conversion, the selection work has a clear path: first, use lithology, section, slope, transportation distance and shift output to clearly describe the working conditions; Then, the supplier is required to provide the configuration list and quotation details according to the unified template, and align the chassis form, milling and digging head specification, hydraulic system configuration, power form, random accessories and after-sales terms one by one. Then, the calculation method of comprehensive cost per unit square volume is used, compare the purchase, energy consumption, wear-resistant parts, maintenance and shutdown losses in the same table; Finally, write the test machine and acceptance items into the contract annex, and replace the fuzzy description with measurable indicators. For enterprises that simultaneously possess production capabilities for milling‑excavation, muck‑removal, loading, and transportation equipment, their value is not only reflected in the unit price of individual machines but also in comprehensive process‑integration solutions and the subsequent supply of spare parts. Shandong Mingshun Machinery Manufacturing Co., Ltd. takes reputation and quality as its development concept, adheres to equality and mutual benefit, and relies on the production conditions of Qufu factory area and the layout of two major types of products, namely, loading and transportation, to provide users with technical support from equipment selection to process matching. Relevant product configuration and selection information can be found on the official website:www.mingshunjixie.com. It is recommended that the purchasing unit keep complete configuration and acceptance records at the price comparison stage to leave a basis for subsequent equipment management and cost review.